Outlook.com account added without consent to 760+ Outlook groups - no way to stop it, no support channel available

Thank you for following up. Here is the update you asked for. The matter is not resolved, and it has escalated since I posted. Between 21 October 13:28 CEST and 22 October 19:15 CEST, a window of roughly thirty hours, my account was added to sixteen further groups without my consent. While I was in the course of removing myself from those sixteen, two more groups were created and four more notifications were delivered. The day's total is therefore eighteen unconsented additions, all of which I have now removed one by one. Eleven of those eighteen groups sent me meeting invitations during the same day; the content is sexual in nature. The aggregate membership of those eighteen groups is 894, at between 47 and 50 members per group. Net of my own account, that is in the order of 876 third-party mailboxes to which my address was disclosed in a single day, and whose addresses were in turn disclosed to me and to one another. Those members are unknown to me and are spread across gmail.com, icloud.com, yahoo.com and a range of European and North American providers. On your three suggestions, each of which I have now acted upon. One. Report, then Report phishing. I have reported every group that sent a notification today, eleven in all. I would ask you to pass one observation to the product team. Outlook.com does not allow a user to report without simultaneously blocking the sender: the dialogue states that the sender will also be blocked, and the only options offered are "Report and block" or "Cancel". There is no report-only path. In this case blocking is demonstrably ineffective, because the entire groups.outlook.com domain and a substantial number of individual sending accounts were already on my blocked list, and the additions have continued without interruption throughout. Blocking governs delivery; it does not govern membership. Coupling the two obliges a user who wishes to assist your abuse team to take a measure that does not work, and which may suppress the very record he needs to preserve. Two. The built-in support channel. Noted. It is, however, the same channel as my existing consumer support case, which has had no substantive response since 8 September. Three. The feature request. Noted. I would observe that a tracked suggestion subject to a user ballot is not a remedy for processing that is taking place now and has been taking place since June. On the substance of your answer. I note, and record, your statement that Outlook.com "has no setting to stop people from adding you to a group", and that moderators "can't remove you from these groups or block the people adding you". I take that at face value and I am grateful for the candour. It is, however, precisely the difficulty. A person who objects to a processing operation must have some effective means of giving effect to that objection. If the position is that the product offers no such means, and that the routes open to the user are a support queue that does not answer and a feature request that is put to a vote, then what is missing is not my understanding of the settings but a control in the service itself. What I am asking for. (a) An escalation to a team with authority to prevent further additions to my account, rather than to remove me after each one has already occurred; and (b) Action against the accounts creating these groups. In every instance I have examined, the owner of the group and the sender of its messages are the same identity, and the sending accounts are ordinary Outlook.com consumer accounts. If no such escalation route exists through this forum, I would ask you to say so plainly. A clear statement that the product provides no preventive control and that the forum provides no escalation path is itself a complete and useful answer, and I will treat it as such. I will continue to document each day's additions. The complaint before the Spanish supervisory authority remains open, as you suggested.