I am unable to log into Amazon Seller Central using my primary account (which is admin and has all the permissions).

1. When I sign in, it sends me an OTP to my phone (I don't receive this).

2. When I request a call, it says the country code is not recognized, even though I have used this for several years.

3. My secondary phone number also does not receive OTP, and the same error persists for the phone number.

I do not have the Authenticator App set up for this primary account (although I will do that when I can get access again) - i am able to get into the forum through a secondary account, but this does not have any permissions to make changes....

How can I regain access? I see this is a common problem....