Error Verifying Mobile Number - "The phone number provided is blocked for verification."

Hi there,

I have the following:

  1. iPhone 15 Pro Max
  2. iOS 17.5.1
  3. Solid WiFi
  4. Solid Cellular Connection
    1. Located in Malaysia
    2. Cellular provider - Maxis
  5. Garmin Messenger v1.18.1

I am trying to verify my number and keep getting a "The phone number provided is blocked for verification." Screenshot below. I have tried with a different number that I owe, and I am getting the same issue. What can I do to resolve this issue?

Thanks,
-rastam.