Buying a new car turns into a nightmare experience!

I recently purchased a Chery Tiggo from Chery West Rand and it's been the ABSOLUTE WORST customer service experience I've ever had in my entire life!! False promises, pathetic communication, total lack of respect for my time and patience and they don't know whether they are coming or going. Firstly, they falsely advertise a rate of prime less 2 or 3 then tell you no it's based on what the bank offers. I have email confirmation of a discount that wasn't app**** to the invoice, the deal took so long to get finalised that I ended up paying another installment on my previous vehicle. I had to constantly follow up with them after being ignored via email and text, as though I was selling them the car, not the other way around. I finally got the vehicle last Friday but it was not the spec according to what the salesperson informed me, furthermore the kit that I ordered and paid for wasn't completed so I took the car back on Monday to have it finished which was supposed to take a day or 2 max and now a week later I'm told that it will only be ready on Monday because the kit was fitted poorly!! Again I had to chase them to be told this. I've purchased several vehicles in my life and NEVER experienced such ********** service before! I bought the car as a bday present for himself and it's turned out to be nothing but a nightmare!!