Tried to cancel mobile contract since June 2016 - Still being debited!!!

I have been trying to cancel my Telkom Mobile accounts since June 2016 - I have filled in forms, sent emails, done online enquiries, gone into a Telkom store and I am still being debited every month over and over!! Every time you guys debit me - I reverse the debit order. Now the cancellations email address ********** is now returning emails as it is full.... this amuses me as this explains why nothing ever gets resolved. You guys are wasting your own money been debiting my account - Maybe someone super intelligent can get this cancellation right eventually!!!