Alliance — Refund not received.

I live in tavarekare, bengaluru. I requested for an airtel broadband connection on 19th of september. An airtel representative arrived at my place and collected the activation fee within 2 hours of making the request. However, i received a message from airtel the next day stating that due to feasibility constraints, they will not be able to provide me a connection and tha a refund will be initiated soon. It's been a week and i still haven't received my refund. The airtel customer support executive hung up on me and refuses to answer my calls. Please help me out here. The connection request and acivation fee + 1 month bill was paid on 19th september 2020. The request number is : [protected]