The Telkom Mobile app on my phone regularly has problems. I was at a Telkom store today, and the idiot working there said it's probably because I use a "speedbooster" (she saw the speedtest Ookla app on my phone) and recommended that I send it in for repairs!
Also, the in-store wi-fi at Kenilworth operates at 600kbps, and the ladies working there don't see that as bad. At least Telkom is cheap, but their service sucks.
/Rant for the day.