Gross violation of customer service

I rented a car from this company in cape town, at R399 per day for 3 days. I paid a deposit of R4447.00 including administration fees i took the car Friday and Saturday I lost my bag with the key at the mall, I called them and they promised to bring back spare key and will charge me for it after. Hardly 24hrs in my care the car was confiscated with a full tank and was promised a refund of the deposit plus the 2 days outstanding totalling R3798.00. But to my surprise after the keys were replaced Hettie **** that the car was unusable so they are charging me the full amount for 3 days when it was parked at Chevrolet and full tank of petrol. I called the said place and was told that it was untrue it only took an hour. Instead of Enigma car hire to refund my deposit less 1day and admin with excess the amount was supposed to be refunded is R1974 + R1000 I had to spend because of the inconvenience the total amount that was to be refunded isR2974.00. After various attempts to recover the money I am getting silent treatment from the company and being sent from pillar to post.