BAD SERVICE AT VW STRIJDOM PARK

I have a serious problem where I sent my car for a service at VW STRIJDOM PARK. It had an engine light on the ignition two weeks before I took it in, which I thought it was because it needed service. Long story short, my car engine was opened and they did not put it together properly and it's leaking oil and I reported it from the day I picked it up from the dealer. I reported to the MIOSA. It's been a month and I'm using this car for my business. My income is badly affected, need help please.