Edgars account *****

On Saturday the 17th of August 2019, I received an email from Jet, notifying me of a purchase at Jet Phoenix, which I have never set foot in. So I contacted Edcon group to enquire about the transaction, and was told that a R5 000 purchase was made on August 16 2019, at Jet Phoenix. I cannot be held liable for this purchase as it was not I, who made the purchase and i do not have a secondary card as well. How can a purchase like this take place, when one has to sign to complete a purchase using an account? Please can you advise me on what I should do, in order to have this transaction reversed from my account.