Additional features, settings, or issues not covered by specific Microsoft Teams Free categories
Teams Essential is the standalone Teams license on the commercia license side. So you will not find it via your personal account, because Microsoft's consumer and commercial products are from two separate ecosystems.
If you indeed signed up for it, you would have to manage it via https://admin.microsoft.com > Your products
Your log in credentials would have been:
username @ business.onmicrosoft.com where username and business are defined by you. Does that ring a bell?
Can you check your credit card statement and bank account statement, or recent activities, do you see this charge? It should be about USD 4/month or $48/year.