Poor Service

I took my vehicle into Nissan for a 120 000km service and for them to see why my car lost power, they have had my car for 4 days now. They phoned me on Tuesday to tell me that there is a problem with my turbo to which they say they are going to contact my warranty service provider to quote. They then phone me on Wednesday to tell me that they have to strip and quote on the turbo which is going to cost 2500 ex vat. I told them not to do it and then get a phone call this morning to tell me that my car is ready for collection as i am going to take it else where, they then go on to tell me my inter cooler is leaking when i took the vehicle into them on Monday there was nothing wrong with it nor was it leaking in any way shape or form. I find it disgusting that they try and shift the blame on that when they themselves did as this was not brought to my attention at all. Highly disappointed in how Nissan treats there customers.