Expecting Both Telepathy AND Time Travel

Caller: *Irate* “I received this letter from [Collection Agency]. Why is that? I paid my bill!”

Me: “Let me see… I see the payment for [previous month] has not been received.”

Caller: “I did pay it! I paid it [twenty days too late]. I always pay at the end of the month!”

Me: “When did you exactly pay?”

Caller: “[Date].”

Me: “I see that payment, but it seems it’s been processed for [current month].”

Caller: “That is wrong; it was supposed to be for [previous month]. How could you mess that up?! I paid in time!”

Me: “I see you used your customer account to pay it.”

Caller: “I did. I used the link you guys generated, so this is not my mistake.”

Me: “Did you perhaps use the link for [current month], instead of [previous month]?”

I can see which month she clicked; I’m just trying to be kind.

Caller: “So? You guys should process the money with the oldest bill anyway.”

Me: “Miss, if you use that link, we clearly state which month the money will be processed with. This is an automatic process.”

Caller: “But you guys can see which month is unpaid. You should use the money for that month!”

Me: “Both months were unpaid at that moment. If you use [link A], we have to assume you want to pay [bill A].”

Caller: “Well, you guys should have checked! I just misclicked; you should know I meant the previous month.”

Me: “I’m sorry, miss, but it’s impossible to check with every client if they intended to pay the bill they clicked the link for. Let me patch you through to the collections agency; maybe they can help you.”

Caller: “But you should have known I meant [previous month]!”

I tried, but I still can’t mind-read.