Cancellation of DSTV subscription

I want to cancel/disconnect my subscription. There is an online facility to cancel the subscription on https://www.dstv.co.za/self-service/#my-products - Manage. You then choose the packages you want to disconnect but it keeps on giving me error "Failed" I have spent just over an 5 hours online with no success in getting my disconnect request accepted. This is pathetic, holding the public captive in their system. The cancellation option should be clearly accessible and working properly. This is total disregard and disrespect to the South African public.