Mr Delivery wastes customer's time with adds

On Wednesday 29 November I recieved a. advert from Mr Delivery who were promoting The Pizza Hut's new cheezy melts. I went onto the Mr Delivery app and was unable to find The Pizza Hut's listing as one of Mr Delivery 's restaurants that they deliver for. I went on the net and found The Pizza Hut and their cheezy melts which turns out to be a single slice of pizza loaded with various things especially cheese at a promotional price of R39.99. now you add to this Mr Delivery's commission, the delivery fee and the drivers tip we could see the price escalate by 50 percent. I complained to Mr D by attaching my complaint to the advert they sent me.and recieved an email from their customer services telling me that the add address was a none returnable address and no further correspondence would be entered into. I mean correct address or not the customer services at Mr Delivery receive the. Complaint and refuse to act on it. How do these businesses stay in business. .