Jet Stores don't do proper credit checks to verify identity.

Jet stores opens accounts without proper credit checks!! The system they use to verify the person opening the account verses the actual person has gaps and then innocent people like me gets harassed & i am going to make a case for wrongful defamation of character. I was contacted in April about an outstanding account with Jet Stores. I told them I never opened an account with them and how can they get hold of me now but when the account was opened i wasn't contacted. Now they have my office number, cell number and their collection company can harass me, but not prior to opening the account? I have to proof that it was not me opening the account, i had to go to the police and write an affidavit and send it to them with my ID and a letter stating my case. I did all this in April 2018. Now i get daily sms's & phone calls from the collection company and they don't believe me. Jet still haven't informed them that this is a ***** case. The account was open in a different province (Krugersdorp), while i was working, i even had visitors who can confirm that i couldn't have opened the account. Nobody comes back to me, but i get harassed from the collection company, phone gets put down in my ear because they don't want to hear i was not involved. My ID was used so then i must be guilty. My ID was not lost nor ******. The person employed by Jet Stores that opened the account is missing as no employee number is on the application, they gave the person a R10 000 credit. There must be a better system to confirm identity. On the same day an account was opened by Truworths, i did the same and this issue was resolved my name cleared and they are taking the case further...I will never open a clothing account if i can't buy it cash i don't need it. What must i do to get rid of them?