Appalling customer service at 3 Ackermans stores

I am so emotional right now because every time I go to Ackermans to refund items I bought they just make it unbearable for me. Three times I am always turned away because I bought with a card. Not a credit card tog. The first incident was with the store in Atteridgeville, second one the one on Church street and thirdly the one in Sammy Marks. The latter being the recent one, they claimed that my store receipt from Sandton City is **********. Just because the font looks different from theirs. The attitude of the manager Hector Mahlangu from Ackermans Church was disgusting. The Manger from the Sammy Marks was already acting like I did something wrong before actually verifying if the store receipt is legit or not. You buy things with a card which is the same as cash, because it's not a credit card, they gladly let you purchase items and don't ever let you know about they weird return policy - that should you change your mind, which you have a right to, getting back your money back will be like drawing water from a rock! I do exchanges all the time with other merchants I have never experienced this disgusting treatment. Ackermans a big retailer does not teach their staff the value of good customer service. After so many incidents and inconveniences I do not see myself ever setting foot in any Ackermans stores. I am so angry and today I cried because I feel and think if I was rowdy customer they wouldn't take this chances.