Lewis cash back promo dissatisfaction

I went to a Lewis in Mthatha, chatway street, and they talked me into buying a product that qualifies for a cash back when you purchase, I have been going to the store that is approximately 45 minutes away from where I stay only to be turned back Everytime because they claim they don’t have a budget, yet the cash back promo is advertised all over the store, and they contact me to come and collect and when I do I get disappointed Everytime, going to the store is expensive transport wise but they don’t seem to care, is someone at the store collecting these cash backs for themselves? Lewis in Mthatha chatway opposite circus triangle mall your service is horrible, you have no customer satisfaction service and don’t care about customer service