Wrong parts supp****

Bought glow plugs with vin number for my bakkie and used bank card to pay 3days later still in original package and with proof of payment tried to exchange them with a sample a sales consultant treated me with disdain and dismiss me i insisted on the manager who came more negative and dismissed and chased me out of his shop though i told him its not return but exchange my 1000 rands down the drain for their fault