Plutonium

I'm not sure about the names, I change them regularly.
One is probably Vladimir Putain.
The other one might be mountaindog1, like this account, or it might be any one of Klaas Baas, KlaasBaasYT, or mountaindog1, or something I forgot.
Does this suffice?
What e-mail provider do you suggest?

I want to change passwords on two accounts, but I am not receiving the e-mails (not in junk folder). The e-mail addresses of those accounts differ from the address of this account only in that the one address has the number 2 instead of 3, and the other address has no number.
Can anyone help me?
Thank you.