6K for a broken bath at CTM

I bought a stand-alone bath. When it was unwrapped it had a big crack. I took the bath back to CTM and they refused to exchange the bath. They are saying the bath was inspected before it left their premises. They inspected the bath wrapped, so there was no way for them to tell if the bath was 100% okay. They are claiming the bath must have got the crack on route to delivery or at my premises. Bottom line I just spent 6K on a defective product and CTM refuses to assist me or exchange the bath. I spoke to a very rude Manager : Reno Wilkens at Roodepoort and Zanele at CTM Head Office who were very unhelpful. I just want what I paid for!