Refusing to refund my deposit

I hired a car from Woodford on the 19th of Sept returned it on the 25th of Sept , they held R5000 deposit which was due to be refunded ln returning the car I noticed that the funds were not reflecting on my credit card account , I started making phone calls to Woodford they kept on making promises that they will refund my deposit , I asked a member of staff I was phoning to state in writing that they will refund me , they send me a proof of payment I emailed them stating that I can see the proof of payment but no money in my account .I was now exhausted of phoning and emailing Woodford car hire frlm UK , I decided to contact my credit card provider disputes dept.A member of staff from Woodford started to intimidate and falsely accusing me for damaging their car , yet the car they gave me it had scratches all over when it was handed over to me , when I was returning the car I was shown a scratch the size of the fingernail under the bumper and I took a picture of that , The worse thing they did is to send a **** proof of payment they were hoping that I wont check my credit card account.Woodford has proved to be a dishonest company .I cant afford to be de*****ed so much money , I lost trust with Woodford car hire in Durban international airport I want my deposit back , I did not damage their car.