Incompetence from the Jet stores

I received a call from Jet claiming that my account is in arrears by almost R3000, IT CAME AS A SHOCK to me as I never opened a jet account and upon further investigation it was brought to my attention that a Jet account was opened **********ly in Gauteng with my details. I therefore told the call centre staff that I am from Cape Town and HAVE NEVER been to Gauteng. The person advsed me to go to the police station and get a affidavit and take to a jet store whereby they will forward it to there ***** unit. Yet to this day I am still receiving calls periodically (bordering on harassment) from there debt collection department and the more I explain to them IT WAS NOT ME who opened the account and if they check or there departments communicate with each other they will see my account is under investigation (of which I have to explain numerous times to the Jet callers) and yet they had the audacity to SMS me with a notification that I need to make a payment to \MY"Jet acc even after the day before I had to once again explain that IT WAS NOT my acount. """