Phone number verification failing during AWS account signup in South Africa

I am unable to complete phone number verification during AWS account signup in South Africa (+27). I have logged 3 support cases with no response. Background: I initially tried to verify with my original number but never received the verification code. After multiple failed attempts the account became blocked. I then attempted to create a new account with a different email address however AWS identified it as the same organisation and restricted the free tier on the new account. I now have a different working mobile number that can receive SMS, however the verification is still failing. I believe the original number and/or account may be opted out of AWS SNS which is preventing any verification codes from being delivered, even to the new number. AWS support sent CLI commands as a solution but I cannot run these as I cannot access my account yet — this is a chicken and egg problem. I need AWS to manually opt-in or reset the phone verification on their side before I can proceed. I am able to provide my number privately if an AWS representative or moderator can assist directly. How can I escalate this or get someone from AWS to manually reset the opt-out status on my number?