Where do I start?! I bought my Buick Enclave from ...

Where do I start?! I bought my Buick Enclave from the Olathe location March 2016, always got my oil changed at that location. The last time I got my oil changed (Jan 4th, 2017) I was told I need new back brakes, head gasket is leaking and my struts are blown. Really? The new brakes you all supposedly put on when I bought it. Struts don't just blow out they wear out, why didn't you tell me this the last few times I was in? No they waited until my warranty only had 2 days left on it to tell me. As for the head gasket, it was only the oil you spilled poring into my car. Never again! They will lie and cheat you just to save them.