The reason it sounds confusing is because it's intended to be confusing. I've even had them ask me to pick up 50 folding tables with chairs for them to use at the function, which I was to add to their "credit card" plus a profit for myself. My experience with them has always been in the $2000-$4000 range. I think this was going to work like this: They give credit card number to pay for $3000 worth of food, plus $1000 for equipment rental, plus an additional $800 profit for my trouble. They come get the food, the tables, chairs, and leave (I think they will have sold it beforehand or something). They then dispute the card charge. Whatever their method of operation, fall for it and you're just screwed.
One thing we can all do is to report the call to the operator/phone business department and then follow up with a call to the state Attorneys-general office.
The operator, or at least the business department, will in all likelihood be familiar with the scheme, mine was. Most likely, so will the Attorney General...mine was in Arkansas.
If you have more than one phone line, and have a bunch of time on your hand, drag out the call. Tell them how much you appreciate what they're doing, go over the order several times to be sure you get it correct so they'll be happy customers. Keep 'em talking, be friendly, tell jokes, etc. whatever. They may be having to pay for the call using hearing impaired equipment and personel. Even if they aren't, the operator which has to intervene between each question and answer may as well suffer like you are doing. The operator knows what's going on and will at least talk about it.
When it becomes obvious the call is coming to a close, just tell them you'd be happy to serve them and how much you appreciate it. Then tell them you need a call back number, that your scheduling director will call them back in a couple of minutes.
Might want to avoid using the word "yes". Is this Joe Smith? What can I do for you. John, do you think you can handle the order for us? We do catering of all sizes. Etc.
They'll try to make contact with an employee, who might jump at the chance to make a big sale.
Bottom line...I don't understand all of it, either. Now I just hang up. Employees are generally told not to discuss caters, to call me to the phone.
Some people suck.