I signed up to showmax to watch a specific series

I signed up to showmax to watch a specific series. I then cancelled my subscription and recieved a confirmation email that it was cancelled. Now nearly a year later i realise they have kept on charging me monthly. They dont have call centre to talk to unless you are signed up through dstv. Only a whatsapp chat where they just tell you they have a no refund policy. Very convenient to ***** money and then have a no refund policy. No escalation process. No number to call. Dishonest company. Will never use their service again.