My phone can't make phone calls or USSD calls anymore. Sometimes it shows emergency calls only but I quickly fix that by taking out the sim card and inserting it again and again until the network carrier's name display (top left corner of the screen). I can only connect to the internet. Is there a way to fix my problem?
Ps. I tried asking my ISP about this and they could not help me. What happened is I didn't pay my contract account for one month by later I did pay. When I didn't pay this happened. I'm attaching a screenshot about the error: