Medallion Bank review: Paid in full loan yet still receiving statements with interest charges... How?

We paid in full our home improvement loan on Nov 12, IN FULL, all $23K. And yet, we had an automatic payment pulled from our account on 12/4/24 for $40.66 for interest. HOW DOES THAT MAKE SENSE?! THEN we just received another statement as of this morning, 12/18/24, showing a statement balance of $40.79 due 2/4/25 on a PAID IN FULL $0 BALANCE LOAN. I would like for someone to tell me how in the world does this make sense for a financial institution to take advantage of its consumers this way? I would NEVER recommend or do any business with Medallion Bank in the future. This was a HORRIBLE experience. FYI... Customer Service is atrocious, unhelpful, rude, and condescending. NEVER AGAIN! Be careful folks!