Renault stikland

Renault motors in Stikland is the worst I would not recomend it to anyone ...I took my car in for a service .. collected the car the next day and the car started losing power same dayon my way home, it started jumping in the middle of the road ... and now my car is reducing the speed automatically ... advised them they asked me to bring in the car and they dont want to take responsibility.. and they called to tell me they need to replace the cylinder and it will cost R4990 I gave them a go ahead now all of a sudden they are charging me R30800 asked them not to go ahead as it is rediculous amount... and now they wont give me my car back until I pay R4990 for stripping the engine which we did not even agree on.. asked them to pull out a call recording where they said the R4990 is for stripping my engine and not replacing a cylinder ... they giving me a run arround .. these guys are bunch of ****** .. they **** people for a living...