EC CLUTCH AND BRAKE

Bought a clutch kit for my car... wasnt checked by helper nor me got home did not fit. Try to take it back so they say no pressure plate has a crack.(Never opened the plastic with pressure plate just checked the clutch) So now they dont want to take it back. We are now loosing R1350. PLS BE CAREFUL WHEN BUYING THERE AND CHECK PRODUCTS BEFORE LEAVING STORE!!!!