Pathetic Service from Homechoice

I have been informed by HomeChoice that my account has been handed over to Sigma, contacted Sigma, to ask for a Debit order Mandate form, which I was not provided with, they insisted that I do this telephonically, so I contacted HomceChoice, to see if they can assist, no help either, they don't provide clients with paper work, so I would like to understand why that is? I am not paying anything until I am provided with a Debit Order Mandate form, I will also not pay any extra costs, because I tried to provide them with my information, but this was declined.