Unisyn Enterprises — not refunding the amount of the tata sky connection cancelled

Address:

Flat # 103, SVS VJ Mansion, III Phase, MIG 401-404, KPHB Colony, Kukatpally, Hyderabad, Opp. Sony Authorized Service Centre, Hyderabad, Andhra Pradesh, 500072

Hi,
I am ravi kishore. One lady named k. V. Sravani who said she was training manger o[censored]nisyn enterprises came to my home for selling new connection of tata sky. She made me pay rs 2250/- through paytm. This transaction has been done on may 18th 2019. Till now the connection has not been installed at my home. I requested for cancellation of the connection and refund of my amount. Tatasky says that the cancellation has been done and the refund has been done to the concerned business associate on 13th of june. Till now unisyn enterprises didn't refund the money to my paytm account. Need help in resolving the issue.
Thanks in advance...