Can not handle their accounts properly.... 5 years down the line...

The vehicle that had the Beame device fitted to was traded in at the dealership, way back in 2016!!!! When the car was traded in, I had called them to inform them and they said they will sort it out on their side. They still call me to this day with regards to this device and today I get an sms so say that they are going to deduct my bank account with a debit order that is not authorised!!! What is wrong with these people that they can't even sort out their accounts..... It has been like 5 years since the car was traded in!!!! I even tried to call them now, on my own expense and no-one is answering...very poor communication....tsk