Builders Superstore Chris Hani Crossing Vosloorus is the worst?!!

I received the worst service from Builders Superstore in Chris Hani Vosloorus. I bought boards for wardrobe and I had to return them about 4 times because the sizes and edging was wrong and the boards are chipped, they look old. I even contacted their customer service to complain about the service I received with no luck. It's been more than a month now nothing is done, they keep giving me a runaround,keeping quiet and making excuses when I contact them. I asked for a refund but they refused and said they can't because the boards have been cut.