The problem was a router on Mwebs side. Chelsey from Vumatel in Cape Town took ownership and also it wasn't really her problem she stuck with it till it was sorted. Mweb wasn't interested. Thank you Vumatel - and yes, the ISP change is definitely on.
In the Tableview area many Mweb customers with VumaTel fibre have no internet. Talking to Vumatel they say all is good on their site. Talking to Mweb they say there is a Vumatel problem.
Now - our complex has Vumatel only but only those using Mweb as an ISP have problems. Phoning Mweb...