I had two experiences with them that made me finally take the effort to warn others about this joke of a company.
One time KFC took 2 hours to deliver my order and I tried cancelling it but just-scam would not let me. And then they closed my case with the lie that I did not accept the order. But this time they still had customer support.
Now today I made an order which I needed to change, only to realize I have 0 means of communication. Not to the restaurant, not to just-scam. Nothing. They stopped giving any means of communication.