Incorrectly diagnosed, poor service,unfair treatment

In the month of September, I took my car for an Inspection at easterncape motors (Mazda port Elizabeth).I was incorrectly dignosed by service manager by the name of Andy.He said my clutch has warned out ,I was given a qoutation. I purchased the clutch kit only to find my car never had any clutch issues. I sent back the clutch kit,I was refused the refund till today my car is perfectly fine. I feel like I wasted my money.I dnt knw what to do with this clutch kit