Wrong ID number on my profile!!

I recently acquired a south African ID via permanent residence and I have been given the run around since the beginning of March when I try to get Edcon to update my personal details so that my credit record can reflect my new ID instead of passport number. I opened my account using my passport and work permit in 2012 but i just found out that Edcon has an ID number on my profile and need a confirmation letter from home affairs to change the ID number. I don't know where they got that ID number and put it on my profile when in fact i used my passport to open my account. Makes me shudder that I may actually not have any Edcon credit record due to this mishap even though I have maintained this account for almost three years without arrears!! Such incompetence baffles me!! I have emailed copies of my ID, passport and PR certificate from home affairs with no result. Please fix this mess that you created asap!!