Cell C needs to wake up and smell the coffee!!!!!

Pathetic service!!!On the 25th of April I phoned and cancelled my GetMore subscription,I was told an agent will phone me to confirm this,and I need to give a months notice. The agent never phoned. So I phoned again,a month later and same story. Asked them why do I need to speak to an agent, I just want to cancel the subscription. Long story short, today nearly 4 months later, I phoned again and same story. I told the agent they've been taking my money every month, my month notice has passed long ago. Eventually she put me on hold, and then another agent, full of questions as to why I want to cancel my subscription. And I've been told that I still need to pay the subscription fee until the end of September, because I need to give a months notice. I DID GIVE MY NOTICE ON THE 25th OF APRIL 2019. Must I now pay months extra subscription fee, because they did not do my cancellation as requested. Is this what CellC does to loyal customers? I've got 11 months left on my CellC contract, after that I am leaving them, the customer service is pathetic and yet now, they charge us more for contract fees. I still do not know for sure, if my GetMore subscription has now been cancelled, I received a sms from Cell C "GetMore could not be deactivated on youre account. Please call customer care 135. Cell C" I phoned them, and gues what, they told me to phone GetMore again!!!They are taking my money for a service that I cancelled 25 April 2019, clearly somebody is missing the point of " a month notice" PATHETIC. Please just cancel this subscription and stop taking my money for something that was cancelled!!!!!!!!!!!!!!!!!!