Appalling service

I took up a contract with Telkom in 2015 for a laptop . I visited their branches to cancel in 2017 as the contract was done and they advised that I should come in to cancel the debit order as it will continue to go off and so i adhered to that. Upon inspection of my bank statement in June I realise that they have been debiting me R78 every month. I was so confused as I obviously cancelled the contract last year. I wasn't notified of this as my notifications are set for R100 and over. I went into the Telkom branch to find out what exactly is going on and why is there still a debit order for R78 when according to my knowledge it's been cancelled. I later find out that unfortunately it's not their problem as I was supposed to check if the documents was faxed to head office hence the agent didn't do what they supposed to at the time. The lady advised that I go on the Telkom website to sort out my query. This is absolutely unprofessional and down right unacceptable as I as a customer has been paying this amount since last year for absolute nothing . And even making the matter even worse the service I received when I went into the branch so unhelpful which left me as a customer even more ****ed off. I would like for someone to contact me as soon as possible to sort out this issue ********** 776 **********