Airtel — Airtel SIM not working in Saudi Arabia

I have Airtel prepaid SIM ([protected]) from Hyderabad, Telangana. Before leaving for Saudi I took international roaming service on it. The message was that it will be activated upon reaching the destination. But after reaching Riyadh it's not catching any network. This sim is linked with my bank. Please resolve as it is important to receive SMS and OTP on it. My Saudi Number is[protected]. Also I have alternate postpaid Airtel SIM [protected] which I use in mobile only to receive messages sometimes. My email is naveedahmed.[protected]@gmail.com