Myles Car/carzonrent — refund not yet credited to account

I've booked kuv 100 car on 4thnov 2017 thru app & cancelled later on 6th nov as per their cancellation policy some charges have been levied & remaining amount is still not yet credited ive been calling the customer care since the last days. I've written a mail regarding the same but no revert from them & when contacted my bank they are asking me to check with myles whether it was credited to other account instead of my bank account very pathetic & poor service & i'm going to sue very soon booking id is 6702807
Amount: 5, 149 & 5, 000 = 10, 149