Synchrony Bank review: Synchrony Bank Financing for Empire products (carpet and tile)

In the latter part of year 2022 Syncrony Bank financed carpet and tile installed by Empire Today Carpet and Flooring in Las Vegas, Nevada. The total cost was approximately $3000, I paid all of the money I owed before the promotional period was up except for $59.68, unbeknownst to me. I'm an elderly person and when I received a bill for around $600 or more (I can't remember) from Synchrony, I didn't realize that they had charged me all this interest for not paying $59.68 until much later, I was just paying the bill. Finally, when I received extra money I attempted to pay it off and get rid of them for good. On January 30, 2024 I sent them $400 because the last bill I could find dated 11/22/23 said $437.65. I figured I owed less since I had been paying, They didn't send a bill every month, only occasionally, Today (2/13/24) I called to see if I was paid off. They said I was except for the $59.68 promotional fee. That's when I finally understood the situation. I was highly upset and said a few choice words but was going to pay anyway until the CS rep lectured me on being rude before I could pay. That was the last straw.