I've just chatted with a Vox agent. He says my Vuma 50/50 speed will remain unchanged but my subscription will reduce to R899pm (R150 less than before). But if I want a speed increase to 100/100, then it will cost me R50pm more. But the likes of Afrihost and Axxess are providing 100/100...
There are many other excellent options left out between R8000 and R89000. E.g. 24V 2.4kW pure sine wave inverter plus 2x200Ah batteries for about R20000.
Very embarrassing - I've just discovered I had bandwidth control settings enabled on my router which obscured my upgraded speeds. So yes, I got my free upgrade who knows how many days ago.
Besides Google certified, you also need to know which are Netflix certified/approved (for HD and 4k content). I know the Xiaomi devices are, I don't know about the rest which are listed. Other Google and Netflix approved devices I know about are the NVIDIA Shield and the Ematic.