Inconsiderate client dealings.********** service

18 months ago, my Jet card was used **********ly and they bought R8 000 worth of goods including a cellphone. After realizing this, i followed the due process of lodging a complain and drafting an affidavit as advised by Jet. After a month, i realized that my balance was adjusted to the correct amount (Charge was reversed). I then paid off the balance in February with an intention not to use the card in the near future. However,i started receiving SMS's about an outstanding balance (R995) and when i contacted Jet, they confirmed that the charges come from a cellphone insurance company (From the ********** purchases). Jet assured me that this will be resolved in 3 days and nothing happened. I have called the Jet customer service more than 5 times and they keep giving me a case number which does not help me. i have even called the collection agency that sends me SMS