GptPlus account being deactivated or I don't have it

I tried opened ChatGPT page today and found all my dialogues are gone. A logged out and tried to login. Got next message:

Oops!

You do not have an account because it has been deleted or deactivated. If you believe this was an error, please contact us through our help center at help.openai.com.

I deleted all cache and all cookies from the browser - it did not help. I tried another browser - it did not help either. What can I do? I have time on my subscription left and I want to use it.

My account email: anamoore2016@retradmail.com