Appalling service

Appalling service I drove straight to krugersdorp korean motor after buying a car I show them invoice with VIN number for service kit but I specifically say not complete I iron out what I need and don't need consultant gave me fuel filter cover only to find out actual fuel filter them bought elsewhere I return with slip for refund on Wednesday I'm told I must take something else due to policy of no refund if parts correctly supp**** now till date no one called after I was told to leave my number now tricky part is how was the correctly supp**** if I didn't subtract actual fuel filter not cover yet I can't be refunded because he was supposed to add the fuel filter if correctly supp****