This problem just happened to me before 6 days ago.and i used official whatsapp in that time. So there is no issues with my side. Then i contacted whatsapp throug emails. They keep saying i am using unofficial whatsapp and please use Official one to login. But using my other's devices,i can login to my whatsapp and can use it without any problem. So the problem is not with the App that i downlaoded through Playsore or Official Whatsapp Page. Problem is with My device.

Because if i register new number then i can use that account for some times and then again

Whatsapp says,

"This Accounts Can no longer use Whatsapp Due to Spam"

Confusing 😂.

Then i can request to fix and they will release my account because there is no problem with my side. so within 24 hours they will fix the issue and saying like,

" we restore you account .... problem with our side.... please verify to use whatsapp"

Similar to above message and then while verifying ,

Whatsapp saying

"You need the Official Whatsapp to Login"

😂😂 Funny. Because this is Official and it says Please use Official this is not Official.

To fix this i need to go to whatsapp headquarters for installing whatsapp 😂. Because i can't find Official one from other places.

This Problem Happens like a Loop with Every Mobile number that i use to register for Whatsapp.

So i found the problem is with the Play Intergrity Api and My Play Service says "My Device is not certified" I did so many experiments and finally Fixed that. Now i am using my own account without any problem.