Deceiving marketing strategy

So I went to KFC to get myself a meal and it has a wifi sign to show that customers are allowed to used their Wi-Fi while enjoying their meal, so while I was eating I opened my device to connect to their Wi-Fi and it obviously asked me a pin to connect with so I went to the cashier to ask for it and I was told they do not have enough data they only have enough to other the stock So tell me who's problem is that so KFC stop marketing with what you can not afford ok