Hathway Broadband Chennai — Refund not came

Hello,
My account number is [protected]. Mr. Vignesh from Hathway sales team came to my house marketing their internet. He tortured me for several times and final I paid money for getting internet. Wifi router they shown for 5g. But they installed 2g so I asked the person and then I came to know cheating done... I complaint customer care and asked not activate my account and refund my amount. They agreed and raised a ticket and asked me to wait for 15 days.
On 10th November, another ticket raised by themselves
Your Request for Hathway has been generated with a Service ID[protected]W224261
Till now my amount not came. I called customer service several times, they are giving weather report as in 48hrs your amount will come. Many 48 hrs went and till now not came..

Ay other way to get my amount from them ?