So you didn't do all the steps as you stated.
SMS is text message and it states in the link I provided what to do, contact your phone carrier also in the link that you have to do if its over 24 hours.
I'm going to copy and paste it here for you in case you missed it in the link
Still not activated after a day?
It might take up to 24 hours to activate iMessage and FaceTime. If the issue continues after 24 hours, follow these steps:
- Make sure that your device has the latest version of iOS or iPadOS.
- If you're using an iPhone, contact your carrier to make sure that you can send and receive SMS messages.
- If your iPhone is used with a carrier not found in the wireless carrier articles make sure you can send and receive international SMS.
- Contact Apple Support.