[Resolved]  Idea Cellular — sms is not sending

I have complained through customer care that sms is not working, they said it would get resolved by today 5pm it hasn't. I tried restarting, resetting my phone, it did not work sadly. However i can receive sms, use 4g data and call. These features work fine. I inserted a different sim in my phone it worked fine. But for this particular sim it doesn't work please resolve my issue