insurance claim that brrings nothing but pain.

I was involved in a car accident on the 6 of Dec 2017 claimed with Hollard ( Brolink) who provides worst service ever not even once I missed payment but the claim till this day Is not yet finalized . I call them daily and as costly as it is they are not bothered because they promise to call you back with feedback and they never do. On Tuesday the 2 Jan 2018 I called them to cancel the claim rather and get my car back to fix it myself they refused, the person promised that by Tuesday she will call me and update me that also didn't happen. I have asked for many things as a customer and I am denied, number one the damage on the car cannot be costing what they say I asked for them to give me a change to take the car to different assessor and obtain different quotation thy refused and cannot even give me valid reason why I am not allowed to get different quotes , I then requested them to email me their assessor's quote to see how did he gets to say fixing a passenger back door will cost R120 000 I was told they cannot send me its confidential, mind you its confidential yet my car. I asked to speak to the manager who promised to send me yet with few details edited out that was during the 12th Dec 2017 who also didn't send it. I am tired of calling them daily because its of no use. As far as I know the customer has a choice , even the reason behind the write off I dispute because that car is not damaged that much. Hence I decided to get an intervention, can I get my car back and fix it myself cause they are just on a mission to cheat me. If you ask them to email you your contact they send you schedule apparently that is what is contract no wording details of your insurance to see what you covered for and what not. I want my car back their service doesn't deserve to be paid for. How do you take this long while you didn't even offer the person a courtesy car. who knows what else are they cheating us on since they don't have answers for anything. On top of that the other day I called they I was told about extra damages more that what my car was taken with and they said the assessor will deduct the money for those damages. Yet the towing paper that stated the damages was send to them also and they cannot explain where are they coming from