Without my car for 2 months

I bought car from them in July and we agreed they will replace 2 turbos on my discovery 4.waired almost 6 weeks to get car. Took delivery of car in Dqeberha and drove to Capetown immediately 200km before Capetown car went into limp mode I informed them immediately of situation. They said must take car to DQ Auto in Brackenfell in Capetown. They removed turbos send it back to Dqeberha and it was send back 6 weeks later. Installed but car did same thing. It's up and down with them since then. I took it back to DQ Auto in 1st week of December had had car whole December and January. I called them and send emails to Webuycars. Eventually second week of January took car from Brackenfell and drove it to Dqeberha on limp mode. Since then car is still with them. When I ask when can I get my car cause it's been 2 months without a car they say they waiting on headquarters to approve to fix car. When I agreed to change turbos whoever suppose to put new ones in cause it was included in my installment for R45000 they fix my old turbos which was never part of the deal. I have flown several times from Capetown to Dqeberha to sort this out. I even app**** for another car finance and asked them to cancel deal I was going to buy same car from them cause I had finance already and waited on them to cancel and they refused. As we speak I do not have my car and Uber to work and back cause they have the car.