Irate client

I am writing this review with utter disgust and regret, I have a direct axis loan which I have faithfully paid from inception, unfortunately in May the account went into arrears with one payment missed, I phoned direct axis and the consultant advised me I can make arrangement for the arrears which I made a 3 month payment arrangement for, I made the arrangement in May 2025, first arrears payment went off in June, second one on July, third one didn't go off, to my surprise when I called direct axis today on the 11th of Septemebr after getting a statement that amount is now higher then what I committed to which was R777 and some change it is now 899, and according to the consultant the system throws off the arrangement which a client puts in place, which I am not happy with at all how is that possible so again I am being punished for the incompetence from Direct Axis is this how you treat your clients, you dont inform them of system glitches until a client calls, you just decide to change amounts without communicating with clients this is disgusting.