HOMECHOICE - *****ulant transaction and collections keep calling for me to pay this!!

I was recently contacted by Homechoice for an outstanding amount on my account. I have closed this account some time ago already and even when i had the account, i always settled immediately. This instance I did not purchase on my account and was informed that there was a purchase of 28k on my account and that i am in arrears with 16K! I told them that i did not purchase this - where was it delivered?. It was delivered in Claremont and i live in Eastern Cape - i asked if they were not suppose to ask for an ID BEFORE delivering and was told that i needed to do an affidavit, submit it to them and they will investigate. They were not willig to give me the details of the delivery address as i wanted to make a ***** case. I have been continuously called from Collections, and even suggested i "pay so long" so that this does not reflect badly on my ITC record - which i refused as i did not make any purchases and the account was suppose to be closed. AFter i sent the affidavit multiple times i was informed that it would take 60 - 90 days to investigate but that they would keep calling me as this function is automated and i had to inform them every time of the investigation. This is unacceptable and no one at Homechoice can resolve this or is willing to assist. Lisa Erasmus were helpful in redirecting my call, but thus far i get regular collection calls and cannot get through to their loss department as there is no response. I do not see why if THEY made the mistake that it has to reflect on MY ITC record and why they cannot supplly the address they delivered to so that i can take it up further with SAPS as well. I was instructed not to do this as they do the investigation and it wont make a difference - and will only duplicate if I made a ***** case as well. I need to get this resolved ASAP as this is dragging on with no resolution from their side expect constant calling to request i pay this account.