Airtel — incoming/outgoing calls not connecting.

Address:	011
Website:	Airtel. In

I have another airtel connection in delhi which has gone to auckland after paying roaming fee of rs 3998/ on 10 nov 2017, its net is working but there is no incoming calls and no any out going calls connecting. We talked to customer care executive on 198 and was told to contact nodal officer. We contacted to nodel officer but no use. We also connected to airtel centre at vishnu garden for 2 days, they wrote an email to head office, but no solution has come up. Then we gone to customer service center janak puri, new delhi. On 17.11.17 and 18.11.17 and they asked us to change the net work available over there, got changed the net work for 2 days but nothing came out. We are in problem as this phone is with my daughter and she is there on student visa. We are to tensed due to non working of phone. Kindly do the needful to resolve this problem.
Thanks
Jaipal singh.