Airtel — not able to use my number since last 10 days

Address:

Patna, Bihar, 800026

I have an airtel bihar number which was in postpaid plan. I requested to change it to prepaid. Prepaid is done on 10th april 2018, from that time till now i m not able to recharge it in any way. Airtel store people sent a mail to higher authorities but couldn't get resolved. Customer service suggest to go to airtel store but nothing happened. I m stuck with this sim. I need to recharge so that i can make call/messages. Airtel twitter service also say, it will be done in 2 days then 4days but nothing happened. Urgent resolution is required.