Bad service

Bad service On the 1st of February 2020 i had an accident my car was sent to Durban south panel and paint by my insurance( Dot sure), they started fixing the car as per insurance approval later on they found another fault which was not quoted they had to send another quotation into my insurance, before it was approved the country went on lock, when they resumed to work on the 01of June 2020 they told me they are going to start with essential workers car, i understood but after that i had to go there to check the progress because no one was giving me any feedback then the started working on it again the second tha was sent before lock down was den approved by dotsure because they paid according to their agreement the time went by i kept on calling to them to check how far they went since no one bothered to give me a progress report including dotsure no one did a follow. On monday the 14 of September 2020 they told me my car was ready i can pick it up, when my husband went there they told him different amount which was not on a quotation that was sent to me by my insurance they claims it was the additional,accoding to our communication with them together with yhe insurance all the additionals was paid, because they didnt proceed with fixing the car without the cash that was requested from dotsure, and my question to them is if the second quotation was short how then did they continue fixing my car since they told me they were not going to continue if the money is short,after the money was paid they they resumed with the fixing. Pleas assist this case has been going for almost a year not i dont have my car with me since the manager refused to give me my money and they should have contacted the insurance with all financial contrains but they said i should pay that money which i was not made aware off since i paid all my access that was required from me.