They will change your User ID – just lodge a ticket. It's in the Support FAQ: https://help.elderscrollsonline.com/app/answers/detail/a_id/7236/kw/change%20user%20id
Indeed it is an MMO, however the TOS applies every time you hit the "Play" button, you should read it sometime. However, with the type of language you used to reply....it is obviously you didn't.