Poor quality pots

Bought this bush baby pots at checkers hyper kemptonpark, to make matters worse i bought 3 i cannot use those things, they are absolutely ******* dont know what material was used making those, they are rusting like i have never seen such.I grew up in a farm we used this type of pots they were never like this to i paid R1000 for the bigger one and the other 2 were R800, been there once and i got exchange after a month and they took the receipt, i need my money back or a voucher to get something i can use, i have pictures of these pots, i was advised to smear them with oil after using but it is not helping.