Pathetic customer service from LEROY MERLIN!!

Worst customer service!!!! We bought a bathroom shelve but the hanging mechanism is broken inside, and now the company refuses to pay for courier cost to replace the item!!! We live in another town, and drove through one day especially to the shop! And now this is the reward that we as customers receive! They are insisting that we go to the store again! So I need to pay R1000 petrol to exchange an item, but thy wont pay R200 courier fee for something that is THEIR fault!!! Pathetic!