What happens in PE does not stay in PE ...........
To my knowledge Frogfoot is running the infrastructure along the Garden route and south coast up to Durban and therefore also the majority of the infrastructure within towns along this route. I'm located in Swellendam and we have been suffering from exactly the same problems since Sunday, 13th March from approxomately 18h30, irrespective of ISP.
The majority tv that I watch I stream from either the UK or US, to say the least it has been an utter nightmare and frustration. Consistently every evening from around 18h30 to about 23h00. Reset my tv boxes, reinstalled apps etc.
I've been on fibre since February last year and up to Sunday mentioned above, I have only experienced issues twice. Normal evenings I stream about 10 gig, weekends around 22 gig per day. I've been with the "same" ISP since 1996, then iAfrica-->Mweb (now IS). Always had excellent service, lived in CT up to 2013.