OTA Subscription

Hi, I have an account with Edgars. During November i received an sms on my phone about Edgars offering airtime from my account and i could use my phone to buy airtime at a cheaper price. I responded to the sms. In December i was billed R25 on my account i then went to Edgars Maponya Mall to find out why i had been billed on my account. I was referred to an external company OTA. They explained to me how this works as i was not impressed about the costs. This was not explained on the sms. I called on 6 January to cancel this subrcription and it was confirmed that it was cancelled. A reference number(***) was given to me. I expected the subcription would still go off in January of which it did as i only called on the 6th. Now in February i was surprised to see the R25 being deducted again after i had called an requested this to be cancelled immediately. I do not need this service and would like the R25 credited back to my account and this service cancelled. I called OTA today and they said i need to speak to Edgars as the service was cancelled on their side on 06/01/2015 at about 11am.