power apps free subscription-cancel

Hi  All,

I am using below id for power apps(email address removed for privacy reasons) using 

free subscription. with in one month i have cancelled my payment in bank.

As of now i am not able to log in admin.cloud.microsoft.

Microsoft authentication is not working . I can not  delete and  re add again.

cancel subscription by bank side only enough or we need to do it in microsoft account (email address removed for privacy reasons)