conns conns and synchrony bank charging 30 dollar late fee more than once when money taken out of bank two days ahead of due date. austin Texas

I bought a 1000 dollar appliance from conns on zero precent credit . I have been paying 200 dollars a month tring to pay it off because of the ripoff from conns and synchrony bank. It doesn't matter if you pay 2 days ahead of due date or five days ahead of due date . They still charged me a late fee of 30 dollars. i went two times they said it was out of there hands. i called sychrony bank two to three times and synchrony bank could not explain the lost time when the money was released from the bank on time two to five days ahead of schedule and when they got it. I had a bank employee call synchrony bank and it still didnt do any good. I am loosing time from work and lost sleep time because i work night shift. Is there any other solutions to get my late fees back and i will never buy anything again at CONNS Josie Haase