Hathway Brodband - Issue with refund

Hathway customer service has assured me that Hathway can provide the connection in my area and will give me the link to pay the money. I have paid rupees ****/- on **th December ****. After paying the money they said that we couldn't give the connection since we don't provide service in your area and assured me the refund of the money paid by me. It has been ** days since the amount has been paid and ** days since the complaint has been raised. There has been multiple emails and calls to Hathway customer car., I have even appealed to on their official twitter page and visited their office in Hyderabad but still, I didn't get the refund. The person at Hyderabad head office (ho) says that customer complaint dealer (cd) will deal with the issue but cd says that he will not look into the issue. Hathway's customer service is unwilling to resolve the issue. Their twitter handle doesn't look into the issue. Whom should I approach? On searching online, I could see that there are many people who are having the refund issues with Hathway. I doubt that either Hathway is intentionally not refunding the money or is making interest on the customer money to be refunded. I would like to say that, Hathway has the worst customer support.