iMessage cannot select phone number

Hello, yesterday I switched from T mobile to Verizon service and upgraded from an 8 plus to a Apple iPhone 13 . Unfortunately I cannot select my phone number to send and receive text messages from iMessage, I keep receiving an error pop up box that says an error was made in activation. I have tried so many things, talked with Apple and Verizon and it persists. Can anyone help? This is very frustrating

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Re: iMessage cannot select phone number
Customer Service Rep

Welcome to the Verizon family, Kchakon. We want to ensure your device is up and running properly at all times. Let's take a closer look into your iMessages. Just to confirm, did you port in your number from your old provider? Have you followed the steps here, -Danielle