I will never make use of their services AGAIN.

I was given a voucher for R600 for an online purchase. I was then told it was an error on their side, and for the inconvenience they will give me a R100 voucher, I order from them everey single month and this is the service I get. After I went and paid my order they realised their mistake which was made on their side (bear in mind) not my mistake, I went to one of their stores Yesterday and I was told it is their fault and I should get my goods at the price that was given to me. Absolutely pathetic. I will never make use of their services AGAIN.