Got the same thing. Called the number . Got a message saying that no one was available to take my call. It was some [***] sounding f*** that I coudn't really understand. Go figure.
Got the same $4.73 charge. My bank says that it looks like my debit card may have been compromised and I need to cancel it and get a new one. Can't find out who "JT Online Merchants LLC" is. Some scam, probably.
Got the same $4.73. These companies usually do a test to see if they can get access to a card with only a small amount only to hit you up for a lot later. Guess they figure you won't notice a small amount. Checked J T online merchants through Google search. Check out their address. Cancel your card. I did.