Very bad after sale service, not paying back my deposit

I am very disappointed with Sani, I rented a bakkie on the 26th June, and when I got home I realized that the front passenger door were not looking even if I am looking it inside, it wasn't. I requested a replacement car, which they did bring. Fast forward i return the car on the 29th June, they did all the checks, fuel, damages etc and I was told everything was in order. Few days after I see a transaction of R2333.88 on my account, I called and they said they deducted the money because the car did not have full tank when I return and all sort of charges which I still don't understand till today.

I spoke to the agent and I just gave up because he said they will investigate etc, so I said since you have already deducted your money please pay back my refundable deposit of R3800 and till this day I haven't received it, from 29 June 2025 till today 19 July 2025... when I call they always say different things.

To be honest, I will never ever use Sani Services and I advise everyone not to because they are ****mers