Very bad service

Terrible!!! Took out a Loan in Jan 2025. Firstly they phoned me and tell me that my payment is due. I asked them are they not taking the money by debit order? She assured me that they do but she just phoned me to remember me of the debit order that will go off. A week later she phoned me because the debit did not go off, although there was enough money in my account. She gave me the details to deposit the money which I did immediately!! The next month the payment still not went off from my account and account details etc was checked!! I then took it on myself to make the payments manually and I paid extra!! Now they have listed me at the credit buro and demand payment as the loan was already paid up in May 2025!!! Very bad service!!