show pop up "you have been temporarily blocked from performing this action" i don't know why show it ? plz hurry up

I intent to create a website for my clients, called eg: xxxx.com where they will login into that website, and will be able to read a whatsapp QRCODE and connect to there whatsapps numbers and administrate there clients thru my website, like answer clients, transfer to other users from these user account and so on. Each client should be able to have multiple numbers connected within there account.

So let's say, client Joe purshases plan gold in my website, he will get a login and password, after that, Joe will log into xxxx.com and in section 'CONNECTION' he will be able to read a QRCODE and 'connect' his whatsapp numbers . Yes, he should be able to connect many numbers if he wishes to ! That way he will have many 'Active Connections'. Can I do that using Twilio ? Will he need to verify every single number on facebook platform ? Or that was only for me, the owner of twilio`s account ?

Please, make an easy answer so I can understand it, I'm new to all these , show me the path, I`ll use PHP/websockets along my journey !! Is these 100% possible ?

Thank you very much !!

Messaging may be unavailable. Review issue, this is showing below number any solution?

Hi,
Is there an API to check if a WhatsApp account exists before trying to send a message?
or example if you open a link like https://wa.me/38970345678 the WhatsApp app will show an error saying "The phone number +389 70 345 678" isn't on WhatsApp."
WhatsApp Web will give you a different error but it is basically the same: "Phone number share via URL is invalid."

Our WhatsApp business phone number display name is approved. But name not showing while receiving messages. Only number showing. How can fix this.