This is why I always call to order for takeout or delivery. I'd say that 75% of the time I experience some kind of technical issues with online ordering. Just talk to the human at the store.
I've learned to just call orders in these days.
Somehow (well, we know the reasons) many websites and platforms require you to have a full inner model of its workings if you want to get things done. If you call, more often then not the person calling you does that work for you.
The whole reason I call is E.G. Round Table Pizza had a perfectly good "Web 1.0" website. Instead of updating some CSS rules to make it render better on mobile they seem to have outsourced to a third party and now everything performs worse and has it's own clunky hell. So instead of using a shit re-design on a website I just call on the phone.