Disappointed and Hopeless

I took my car in for repairs on the 27th of March (take not they had my excess payment in their pocket before I took the vehicle there so that that could order spares). It's been almost a month. I receive minimal feedback and promises of feedback are never met. It took over a week and me fighting back and forth with the panelbeaters and my insurance about additionals. The panelbeaters sent the claim, the insurance never received it. I got thrown back and forth like a child when mom says 'go ask dad' then dad says 'go ask mom'. For a customer to have to delve into internal business politics is just unacceptable. At that point, my car was being assembled. Then they found extra damage. What doesn't make sense to me is that the car was already stripped where these "extra parts" were found needed. They should have seen this in the disassembly phase! Now the problem? They got the paint colour wrong. It's taking forever for them to fix that. With promises of 'we'll prioritise your vehicle', 'we'll follow up and get back to you today', but no follow through on these promises. I travel from Pretoria to Jhb every day, not having my own transport is massively inconvenient. And costly. And the thing is, I don't want to be a nasty person in order in order to get good customer service. I feel useless, that I have no control in the matter. All the control lies in their hands and I can do nothing. Absolutely nothing. I'm beyond angry, and just deeply disappointed and disheartened by this whole experience.