The worst service Land rover The Glen

My phon ***. My name is Joseph. I just took my car to Land rover the Glen for repair's. I was charged like close to R12000 for what they say is cosing the gas leak, after that i than get called an billed a ather R4000 something that i knew was not broken before.. To cut the story short now they telling me to pay a the R40000 for God knows what.. Nathing to show why they billing all this money. Its your word against theres. An they not even getting your car fixed. I spent over 1 month with out a car cos of them an still dont have a car Can i open a case about them in court Cos it seems like its alot of us All this money for what???