Suzuki Motorcycle — fooling customer by giving any fault

Address:

Valsad, Gujarat, 396191

I had seviced my gixxer bike, some sound originated from engine, we repaired it and given fault of oil is not there, after that again this originated and we given again now they are saying we have not serviced for 4 month and not chnaged oil so this happened, is we are fool looking to them, saying any fault and are ready to pay for it, we also now the status of bike and how to deal with it