Few shops in Queensway do. btw Mustafa does carry all top end models too. But obvs the price is not competitive for those models. I had been recently and saw the top end models in range of $299 which are sold for $240 elsewhere.
If you do manage to find any shops in Queensway Shopping Centre that accept credit cards, you might find that there will be an additional surcharge on the items you purchased. imho you have more bargaining power if you pay with cash