Poor quality clothing

Last weekend i bought Pyjamas and tracksuits amongst other things at Woolies Centurion Mall. Then my son discovered a hole in the pocket... A day later while thinking about that, the pyjama onesie had a hole as well underneath. Thats when i decided to return them. The cashier tried to justify the tracksuit but i took none of it.

So now, my other boy was wearing the same trackpant(different colour and size) , and at night discovered the hole on the same side as the other one. So it looks like that style has quality defect. What frustrate me is that i must now go back to same store, queue and explain the defect. Woolies must review its suppliers, I cannot take trips for returns all the time.