DStv South Africa WhatsApp refuses to cancel decoder insurance.

I have used the DSTV WhatsApp to try and cancel my decoder insurance. The message I get after going through a host of options is:” Would you like to cancel your decoder insurance? _[Tip: eg. reply with *yes* to cancel your decoder insurance or *no* to keep your decoder insured]_” I type in “yes” and get the following message: “ Oops, there seems to be a gremlin in the system. Let's try this again.”. Thirteen times, same response. Then I type in “next” and get a response that says my insurance has been renewed!!! Again I log in and try to cancel but each time the response is the same. Gremlins my foot! The system is set up to refuse any cancellation. I tried their web page, same issues. The decoder has not been in service for many years, and yet they refuse to allow me to cancel the insurance thereon. This is ******** in my opinion. I tried accessing my earlier cancellation letter (dated 10 May 2019) on the website and get the following message: “ Please check your browser settings, your pop-up was blocked”. DStv can now try to respond to me via e-mail and I will gladly share screenshots of every interaction. I refuse to call them, as their online platforms should work.