Poor Customer service

Dear CNA!! I am incredibly ****ed off and irritated at the poor customer service I have received from your Mall Of Africa branch! I purchased a laptop from them on the 3rd of March 2018 and only after my purchase, did u guys GLADLY take my money but then I am only told that you do not give exchanges or refunds on electronic devices?!?!?! This laptop I have is way too slow for my needs and I am unable to work on it. I have all the boxes, paperwork and tillslip but it's still not good enough. On the TERMS AND CONDITIONS , Refund and exchange part of the tillslip it states that, gaming digital and electronic devices must be returned within 14 days of purchase. I've purchased this 2 days ago and I get given a big fat **** you sorry we can't help you?! I will take this matter further if this does not get sorted out immediately. I will never do business with CNA and I will make sure that what has happened to me will be spread far and wide.