ACCOUNT PAID ON TIME BUT INCORRECTLY LISTED ON ITC

I have been a customer of FinChoice for YEARS! .. I am EXTREMELY FRUSTRATED as I am not getting any help .. My debit order for December 2019 went off on the 14th and in January 2020 I was contacted by Finchoice telling me that my account was in arrears. I sent proof of payment to them and they were able to pick up my payments. I am not happy because I am listed on ITC as not having paid, THAT INFORMATION IS NOT CORRECT, This is affecting my credit scoring. I want this rectified ASAP and FINCHOICE systems updated so that I am able to do withdrawals as this was not my fault.