Additional features, settings, or issues not covered by specific Microsoft Teams Free categories
Unfortunately, unused Skype credit cannot be refunded or transferred to another subscription. You can still use this credit to make phone calls from Skype Dial Pad on the Web.
However, Microsoft has recently disabled any Caller ID on Skype. This means that all Skype Dial Pad calls are anonymous/private. This UK Bank phone number might not accept such calls.