Misleading gustomers

After an armed ******* my wife wanted to replace her cellular phone. With an account at Foschini it was our only option at the time. She wanted a Samsung A20 which was not in stock but had one on display. the next option was a Huawei Y7 which was also not in stock. She had to settle for a Huawei Y6. After careful consideration she wanted to exchange the phone 18 hours later. She was informed that cellular phones cannot be exchanged.

I ask the store to put a notice on their cellular phone display cabinet stating: "Sorry no exchange or refunds on cellular phones." I even made a request to their head office in this regard. The store and head office promised to make work of it. There is still no such notice. Is this how they do business and forcing customers buy products that is not really their first choice?