You just explained how you made a mistake. Your temper also seems to be easily compromised.

I know others who were able to resolve this by going through the ISP's support.

Have the old email access restored. Or provide enough information to SE that they can tell you what they know.

You still have paths ahead of you that can provide a solution, if you do some critical thinking.

You need not play the victim, but if you choose to, we aren't going to find us being very helpful.