I had a similar issue, it seems you can’t activate the watch esim if OneNumber is already active, because it wants to subscribe to OneNumber as part of the automated process.
How I resolved it:
I called the call centre and asked them to remove the OneNumber service. I did NOT ask them to...
DA has 103 seats but their candidate only got 101 votes. Apparently one person was absent - not sure from which party - so it looks as if at least one DA councillor voted for the ANC.
I've been getting the same popup, also with Tapatalk and Vodacom. I normally just cancel the popup but don't get another one immediately. I suspect it's one of the ads.