I was send to the itcba where I didn’t miss a payment!

I am very grateful that someone from mobicred helped me by sending me a statement with all the payments on it. The only problem is that my account hasn’t been updated and taken away from the debt collectors. When I asked why I am still paying them. The awnser And this is copy and pasted: Your account was handed to ITCBA in October 2019 for non payment of 4 installments during 2019. Once your account is handed to ITCBA it cannot come back to Mobicred. But the thing is I had paid and it’s on the statement they send. It is their mistake that they send me there in the first place. This is not right! Please sort this out!