****ed up customer

Good morning, I have a complaint to make....I took my car to Renault Kempton known as (IC auto Nissan Kempton park) on the 17th of March for a service and they told me my chain is slacked and needs to be changed which I agreed thinking they're are professionals until I got my car back on the 9th after more than 3 week of waiting...after taking my a car back a day after an engine light warning popped up,2ndly my start coil bolts were not installed so I was driving the car without bolts in the coils,after 4days my car engine light got worse and start to beep While my car Kemp on loosing power. I took the car back and the only thing they could tell me was the mechanic who was working in my car is in hospital, they say they don't have a car to give me in the meantime while they fix their problem,now I have to use taxis and ubers while I wait for them...the worst part is that I paid for all the repairs they claim they fixed