Bad customer service

My car was involve in a accident August 2017,my insurer being MiWay. Claim was approved and i took my car for repairs , paid access and waited, then came a day for collection n upon collection got the car striped like they have just started with it. I asked why and i was told they had alot of cars that needed to fixed, and then i went to ask as to say why did they even say i should come and collect it knowing they were not even done or even started because i have been calling the whole time and i was told it will be ready that day afternoon. While i was busy asking boom comes this other rude white guy (manager) from there panel beater being all rude and i told him i want nothing but my car n he went on n said i wont get my car since im questioning and ill be getting the car on monday since it was a friday. We fought until another guy( Edward) from the panel beater came and tried to resolve the issue and they tried to put the car parts again and they told me to bring the car again monday and of which i did , after doing all that i was shocked at how they have fixed there car, i asked them why are some of there part old, other places they have used cable tires and the front grill not for that car and they told MiWay is there one who provided them with the parts. After hearing that story called my MiWay spoke to Felicia Naidoo and Gloria ( claim advisor) but they also sent me from pillar to post until i got someone who called there panel beater and told them im bring in the car back and they should fix it n that was late November 2017. After taking back the car Edward did something like a diagnose or something and told me it showed that there was something wrong with the engine but he does not understand what is it since the car was now running out of water time and again. After10 minutes he came back and said no its not the engine but there was a loose clamp and they are fixing it and then after that i went , boom there i was opening the bonnet filling water, called MiWay countless times, sent emails until i was informed by a guy named Sipho telling everyone was out of office until 3rd January 2018 and there panel beater was also closed for the holidays. I then called MiWay from the 3rd January but i was told they will get back to me, until i called friday 05/01/2018 got a different person who told me all the people i have been talking wont be able to assist me and there only person who was responsible and who wil be able to resolve this since it was a mechanical thing was a assessor Ruan van Zyl who he was sending an email to so they can get back to me but up until today i have never heard nor receive anything from MiWay and i am now tired of all this ups and downs. I just need a solution as i cannot have a car that needs to be filled with water evrytime and again.please help