Unauthorized Debit Order for Cancelation of Subscription

Extremely disappointed with DSTV Multichoice. As of late everything is becoming more and more expensive and one has to cut costs wherever possible. First I downgraded our package, but then expenses crept up again, I had to finally accept the reality that I need to cancel my DSTV subscription. I was very impressed as the process is so easy via the DSTV app, they work out how much you owe and advise untill when you can still view, being a "pre-paid' type of service. So, in January 2023, I cancel my subscription, easy peasy. Now end om March 2023 all of a sudden there's a R180 debit order as a cancelation fee that I wasn't even aware of. Obviously I reverse the debit order, knowing that that specific R180 is needed to cover something else, but now I'm thinking surely they can't cancel my subscription and wait 2 months to bill me with a cancelation fee? Surely this is something that had to be advised during or at the time of me canceling my subscription .