I ordered some food from the manufacturer instead of buying it at the store. It is a small manufacturer, and I wanted to make sure I had enough. It is a common practice of this local manufacturer to sell directly to it's clients. I have bought several times in the past and my orders are always over a hundred dollars.
A couple of months ago I ordered the food and went to pick it up as usual. I paid and left.
About a month later, I get a phone call from a person at the manufacturer stating that they undercharged me by $12.50 and asked me to send them a check. I thought it was very petty on their part, but I was going to pay them and never buy from them again. Unfortunately, several deaths occured and my mind is(still is) gone. They called in the midst of this, and said I owed them this time $7.50. It totally slipped my mind. Today, while I was at an appointment, they called again, but haven't talked to them.
What do I say to them, and do I pay? I think it is very petty and bad business practice on their part. I got a bill that said that I was paid in full. What would you guys do? TIA