WhatsApp SMS Verification Code Not Sending to New Phone

When I installed the WhatsApp app on my new phone and tried to verify my phone number, I could not receive a verification code for approximately 3 hours. Although I repeatedly tried both the SMS and phone call verification options, no code arrived through either method, and as a result, I cannot log into my account.

I do not believe there is an issue with my mobile network operator; I can see that the problem is entirely on WhatsApp's end. I do not have an active WhatsApp account open on an old or secondary device—I logged out of all active sessions. Furthermore, I have never received any warning regarding a ban, suspension, or restriction on my phone number.

I demand that WhatsApp inspect its verification system for my phone number, ensure that the verification code reaches me seamlessly via both SMS and phone call, and provide the necessary technical support so that I can log into my account.