Improper handling of customers accounts by Identity Store.

I am once more writing another bad experience by Identity clothing store. I have been loyally paying my account every month without missing any payment since I open an account at Identity. I complained previously on this platform about the same mistake which has been repeated once more with another flag of missed payment showing on my credit report that I missed payment for end of March 2025 when I have actually paid on the last day of that month and sent proof of payment immediately on the same day as I normally do. The main aim of opening this account was to build a payment history for my credit report but sadly this ended up impacting my credit report negatively with two negative flags of missed payments which are incorrectly reported. I have sent emails to their office with proof of payment which shows the account was paid on the last day of March and the response I got was that I used the incorrect reference number like they normally say which it's not the case as I have always used the same reference number given to me as well as my ID number which are showing on the proof of payments I sent every month. I deeply regret being a customer at this store. So many of us are complaining about the unprofessional service we receive from whoever is dealing with clients accounts but there seems to be no improvement at all. I am deeply disappointed.