Poor Customer Service

I am sincerely disappointed in Suzuki Gqeberha(Port elizabeth) I have been without my car for a full 3 weeks now.I bought the car around March this year, the car started overheating after 10 days of coming back from service and I immediately took it back and they said they stripped the engine and saw that there was failure in the fan and that the only thing they can do is change the top gasket of which I do not agree with as the car's top/cylinder head blew so I suggested that they change they put a new top or change the whole engine, I then called the manager Mongezi and he also promised that my car will be done as soon as possible I have been following up to no avail,I then decided to call Suzuki SA and spoke to a lady by the name of Thuli she then said she has called the branch and instructed them to replace the cylinder head, today I decided to call the branch and spoke to the service advisor by the name of Kanita and Instead of saying they are working on my car she just told me that there are cars that have been there for more than 3 months meaning I can also wait in line I extremely disappointed by the lack of service to top things off the service manager is also now on leave meaning I now have to wait 3 more months for my car to be fixed bear in mind that I am the one who is contacting them , they never even once gave me an update on the progress!!! I am so disappointed and disheartened by the way the service staff even speak to a client , they speak to you like you a nobody !!! I'm thinking about selling this car and go elsewhere where I am treated like a client.