Daily harrassment by FinChoice agent yet account is up to date

For the last week I have been called up to 5 times a day by FinChoice agents wanting to know when I am going to pat my account that is in arrears. Yet in December they already took my December installment off on 18th December and not the 21st or 24th. I posted my frustration here on this platform because afterward they were sending messages of payment due 27th December. Immediately they called to apologize and obviously blamed it on a system glitch. As if we don't all know that line. Now this last week and agent by the name of Nolo had my blood pressure boiling by starting off the call to ask when do I plan to pay the arrears on my account. Only after she opens the account she sees the account is up to date actually paid before the time. She was going to escalate the matter to be updated on their side. But like and behold the same agent calls again today after I gave her a piece of my mind, literally harassing me about arrears. As I was about to blow my top she eventually opened the account to once again see that it is up to date. So who at FinChoice is not doing their work, because clearly it is not these agents calling who are supposed to "escalate" the matter. This is clear cut harrassment because of service staff being ***********.