Airtel — prepaid mobile sim outgoing call not possible

Address:	Pune, Maharashtra, 411027
Website:	www.airtel.in

I took an airtel prepaid connection with mobile number [protected] in oct 2017 in up east circle.
It was working fine as long as i was in up east circle.in feb 2018 i moved to pune (Maharashtra circle) keeping my number in roaming. Here, my incoming calls, data, sms all are fine except outgoing calls.
When i call any number, the other phone rings and as soon as the other person picks the call, the call gets disconnected. So i cannot make any outgoing call. Unknown of this issue, i recharged a voice pack in feb 2018 but all of it got wasted. Since then i have made various complaints to airtel via customer care and store but no solution has been given until now even after more than 3 months are passed.
Please fix the issue urgently.