Mismanagement of Agreement and Neglecting Customer

I have been with Debtbusters since 2019 everything went smoothly. But now 2022 things have been so terribly bad, They Stopped paying my Bank Loan from May till I had to pay the bank directly in September as they were harassing me due to Debtbuster system error that showed my Bank Loan was paid up. I was harassed each day by bank, when I call Debtbusters they always say they will come back to me, I would wait a week then I call again to ask what's going on. It took about 2 months to resolve since I had to ask for for a team leaders and managers. Right now again I did not receive the statement for payments made for November 2022 but the money was deducted from my account . On 14 December 2022 I received a final letter of demand from Bank loan saying Debtbusters did not pay them. I completed the online agreement to deduct on 15th December 2022, that did not happen. . I am very disappointed and angry right now due to your underperformance and mismanagement of my agreement with you.