Yeah, Rain's network is absolutely rekt.
After a huge fight with them, they did something about 3 weeks ago and my internet was good again... till last week. Now it's like less than 1mbps during most of the day.
I noticed, it's always fast in the evenings and also fast during loadshedding (I've got an inverter to keep the wifi going).
Can't wait for fibre to get rid of this rubbish.
Now the fight is back on.