Fatfingered my email/password

I was stupid and didn't realise that I fat fingered my email and password. (I was on mobile )

My email is XXXXX.gmail.com, but I entered gmail.cm

On top of that, I must have entered my password wrong in my password manager.

I didn't figure out all of this until after I paid and logged out.

I have proof of payment if out will help to confirm the account.

Who do I need to contact to fix this?

( fix the email)