Is it normal i got a charge for something there is no record of?

I got a credit charge for something it said I bought on amazon. It gave me the order number and told me which state the item was from but I checked amazon and it says the order does not exist and it in my order history there is nothing I ordered from that state for that exact amount.

I went to call the number but it just keeps telling me to go to this website and says on the website I have to tell them which card I used and what item I ordered. However since there is not an existing order in my amazon history, there is no record of this order, and there is no indication even of what I ordered on the letter I got in the mail I could not possibly describe what I purchased.

So how the hell am I suppose to tell them when there is no record of this item even on file? I am not sure what to do since both websites on the paper told what website I have to go on but I cant identify the item I ordered. I order stuff on the internet frequently and I often use gift cards not credit/debit cards.

So I cant guess which one I used to make the purchase either. I would mail in the money since I don't seem to have any other option at this point but I don't want to end up sending it to the wrong place and none of these lines give me a REAL person to talk to so this is getting frustrating.