They won't give me back my car

I was in a accident on the 7th February on my way to work and at first I was able to drive to work but the car over heated and I had to call them to tow it. I filed the claim the next day after work with the 3rd party after we went to the police station. The claim was approved that Monday the 10th February. Car was towed to Harvey's Auto Repair in Durban CBD on the 11th. The only started doing assessments and sending quotes on the 13th. They initially only sent a quote for cosmetic repairs (bonnet and bumper) they didn't check inside the vehicle. Then only on the 17th whilst starting the cosmetics repairs they did they job and noticed the radiator was damaged and then sent a second quote. It's the 4th of march 4 weeks I've had to travel with Bolt and Uber cause I work internationally hours and can't always take public transport. This has messed with my mental health and almost cost me my job. They still haven't given me the right date to collect they lying to my insurance regarding what they doing. IV had to take a loan just to be able to travel. They don't update unless you call them. They are unprofessional and manipulative. I've requested to collect my vehicle and find my own mechanic and Damien **** to me regarding process even the Manager Nicole has tried to convince me to agree to write off my vehicle. I just want my car back and for PMD to stop doing business with them. Now they are keeping my car, this is theft. I've said repeatedly I want my vehicle back. They sent an it's in Painting update last week and that was before they got the parts for inside the bonnet. They are dishonest and my insurance is not following up correctly with them. I requested a cancellation and was convinced this would be resolved this week. I want to cancel my services, it's inconvenient to have insurance if they going to take your car for a whole month.