Treatment received from Pace car rental/earnacar/Samotorlease

Earnacar, samotorlease and pace car rental are one company. I leased a car with earnacar with a view of returning it when my finances improved. I bought a new car in December so I needed to take the car back to earnacar. I called to ask if I could do it in Durban as I had relocated. It was agreed that I could do that and one of their employees even advised that if I return the car early they would refund me the remaining mileage not driven. I returned the vehicle on 2 February 2024 to the pace car rental site. This morning, 26 February 2024,my account was debited once again, for what I don't know as I am still waiting for the refund. So a week ago, I followed up on my refund and I was told they are still checking the vehicle and I will be responsible for any mechanical faults. The vehicle was serviced as required and any mechanical problems were taken care of without claiming from them. A vehicle depreciates when you drive it unlike a house. I want to know what assessment are they doing as the vehicle was in perfect condition when I took it back. This morning when I called to enquire about the deduction on my account, the very person who advised me to return the vehicle early is now suddenly ******** of my matter. Had I known better, I would have just given notice for February and used the vehicle till 29 February and return it then.