I just noticed on my Wells Fargo account that I got charged $250 through my debit card for a recent transaction at a Publix in the U.S., and the amount charged is 10 times as high as the usual amount, even though the goods I purchased are the same as before, not to mention that the purchased quantity is also similar. At the time of the purchase, I didn't find anything unusual in the screen at the cashier showing the sum of prices. Unfortunately, I haven't kept a receipt for this reason. What should I do? How can I prevent this kind of incident?
I went to the store today and got a full refund. They somehow mistakenly added the subsequent customers' purchase into mine. I'm curious why this is even possible, but I'm glad things went so smoothly.