AIRTIME SUBSCRIPTION FEE

I recently closed my account. Upon closing i received a statement reflecting a R25 airtime fee. It has been for three years i am paying and i have never received a statement thus it would not have been possible to stop this deduction on a earlier time. For the three years i have never received any airtime allocated to any of my sim cards but has still been paying for this subscription. I have send an email to jet stores customer service department asking for clarity about this subscription and they failed to assist me where i did ask for a follow up again they did reply confirming it was send to their RMCA department still again failing in assisting me with the complaint. My only request is the number of allocated airtime and the proof that it was given to one of my numbers normally communicating through either via email/sms/phone call