Wont accept goods for return

when we entered the store the manager was there to greet us and helped us with the purchase of the item which was great. however when we fitted the items they did not fit properly and returned to the dtore next day to return the itmes in sealed packaging and the store bag. the lady at the counter said we cant return item cause we dont have till slip but we can choose something else to take. I advised her we dont want anything else we want a refund. I then asked for the manager and some skinny indian guy came over the same one that helped us when we first bought the items. he advised sorry you must have the slip. I explained to him that its absolute ******** as he was the one who helped us and we are bringing it back in less than 24 hours and you dont remember us, but he was quick to help an take our money.The cashier insisted we take something and i repeatedly said NO I WANT A REFUND, we werent even offered a voucher for later purchase. Its reasons like this TOYrus are a dying brand in south africa with a decreasing customer base on a daily base as the store managers have no customer orientation or the customers interests at heart, I want to know how im going to compensated.