Airtel — regarding billing amount

Address:	400097
Website:	Airtel

M hvng airtel infinity plan on my no in whch my plan is off 499 n including gst it comes to around 588 or 590. But from last 2 months m receiving a bill of 620 n more vn i had called up airtel customer care service they told u hve been charged for roaming but i was not gone out of mumbai for last 2 months dn how would i get charged for roaming n d way dat customer care executive was tlkng it was very rude..