Horrible credit provider

Mobicred is a horrible credit provider absolutely useless they have decreased my credit score from 664 to 625 within the last few months. In February they never debit my account for their monthly installment which as to my knowledge at the time the debit order went off, only for me to check my credit score 3 months later too see that it had decreased due to an outstanding amount. No communication was sent to me advising that I have an outstanding amount that was due nothing at all. I then gave them a call and the lady who I spoke to made as if it's my fault that the debit order never went off and kept on telling me I need to keep my debt up to date, what's the reason for a debit order being in place?, she then advised me I need to pay it as I only have 10 days left to pay, remember no prior communication nothing at all. I then refused to pay and told her to tell the accounts team to give me a call as well as her manager and I hung up. The next day I sent in a complaint, the following day I received an email to say they acknowledge my complaint and will be in touch very soon. It took them two weeks to give me a call of which I could not answer cause of my working hours. I then waited to see if they were going to call me again but nothing at all days went by and then finally I decided to give them a call to find out if there is any update with regards to my complaint, the lady then advised me the complaint was closed and I need to pay the outstanding amount. No investigation, no communication, lack of empathy when speaking to customers. I still await for them to respond to me after weeks of calling up. Till this very day they still debit me but the outstanding amount still remains. Awful company honestly please do not go with them.