Time to stuff someone's laptop with errors

This week has been one of the toughest I've had in awhile. My job is more or less about managing people, not really about managing tasks. I don't mean in a manager's managing sort of way, I mean in a customer service sort of way. What makes it difficult, is not having a boss who will vouch for me... or at the very least, not having a boss. Period. What makes it even worse, is having a fill in boss who actually contradicts what I do and say.

I feel like I can relate to this real well: "Time to Stuff Someone's Mailbox w/ Flat Lids"

Customer, upon receiving her Moolatte: “This has a round lid, can I have a flat lid?”

Me: “I’m sorry, the only lid that fits that cup is a dome lid.”

Customer: “But I want a flat lid, Starbucks always gets me a flat lid! Why can’t you?!”

Me: “I’m sorry, ma’am, but the flat lids we have won’t fit that cup.”

Customer: “I want to speak with your manager.” *mutters* “Stupid kids…”

(I go and get my manager)

Manager: “What’s the problem, ma’am?”

Customer: “This stupid employee of yours won’t give me a flat lid!” *brandishes the drink in his face*

(My manager takes one of every single lid in the store and puts them in front of her)

Manager: “Go ahead then.”

Customer: *proceeds to try and put the lids on the cup, none of which fit* “This is ridiculous! Why don’t you have a flat lid?! Starbucks always has a flat lid!!”

Manager: “Then go buy your drinks there and leave my employees alone.”