Reliance Footprint — DEbit card transaction issue

I had done 3 transactions of Rs 2705 in Reliance Footprint, Aundh Pune on 3rd of Dec 2016.

Due to server error the transactions were claimed invalid .However after raising complaint against my bank HDFC, they have clarified that 2 were valid transactions and merchant (Reliance ) has claimed them.

However, till date I have been fighting on this issue and have not got the amount back from Reliance. Managers of Reliance are not providing any support