Poor service delivery

Poor service delivery. Till today the company never completed fixing my car, and never pay me back my petrol after so many times going up and down. The vehicle was taken in in February if am not mistaken, yes the it came back with many faults, now we fighting for my dust cover of which my insurance has approved. And Sophia promised me that she is having everything under control, now when I call her, she doesn't answer. Please assist me, what can I do now. I have to buy airtime everyday to try and sort this thing out, but am not winning. If you ask me, am not recommending them.