Charged for air time that I never requested

Edgards started to charge me for air time the 18 June 2015 - R25.00 I have never requested or agreed to. I only started to receive a statement from them the month of February 2017 (we sold prev house and been renting) and that's the first time I noticed the strange charge. In May I brought the complaint to their attention, they stop the charge from then but they had no intention to do any refund on the money that was taken for almost 2 years. In September 2017 they refunded R100.00 - of the +_ R575.00 they took - and asked me "What do I expect?" I expect a full refund of the full 23 months they charged me for. I will close my account after this kind of abuse of trust. I had to step in the Edgards Wooldands on numerous times and spend hours with them on the phone trying to get to an end. EDCP-171 ********** 658 EDRF-170 ********** 633