Unable to sign-in and can not reset passwd and no free boot volume

Summary:

Two attempts to contact the service staff, the problem still persists. Please help me!

Content (required):

first：

I want to create a free amd instance, but However, it shows that you will be charged a monthly usage fee for the boot volume capacity。

So, i deleted some configurations and the results are terrible.

second:

I can't log into my account anymore. The error is follow:

"Your login attempt failed. The credentials you entered do not match our records.

If you have unsuccessfully attempted to authenticate with this username multiple times your account may be locked out and must be reset via the administrator.