No People Skills or Common Sense

Today @ 08:35 I received a call from the DMC call centre for the several time after giving them contact details and a name for my mother (The leagal liable account holder). According to them I still owe money on my Damlin account which by the way I got when I was 17 unemployed and studying grade 12. The more I tried to explain that they have not received all the relevant documents showing the signature confirmation of the person (My mom) responsible for the account the more they insisted on me confirming my details and says that THEIR SYSTEM shows I am liable for the account. In the first place logically no place will allow you an account in that position and an adult would have to sign liability for the account. Then I was told that this will reflect negative on my credit record!!!! So I again asked them to send me the legal documentation where I have signed liability for the account which of course they can't supply me cause all they have is an account number ID number and my full names!!! So I insisted to speak to a team leader or manager which eventually hung up the call why I was busy repeating my story. This is unprofessional & should this continue I will contact my attorney