Bad Service / Wrong Information

I phoned Mweb to cancel my subscription early January. i was told that I am just to late and that there will be another deduction end of the month, but that would be the last one. That part I understood. End of January came and there was a deduction. No problem. But then end of February came and another deduction. I phoned them and was told that because I do not have a reference number I did not cancel. I did not receive a reference number when I phoned in January and wasn't told that I needed one. I told this to Wayne, but did not help. I will be liable for the last payment. I received this time a reference number. I am very unhappy! Why do they not have it on their system that I phoned last time? Why make me pay again? Very uncool Mweb!!!