From that trace it looks like there is congestion on your exchange or a fault on the line. So if someone else goes online on your home network, that is going to push overall latency up and cause potential packet loss.
I think until Telkom upgrades your exchange, you may need to consider chucking everyone off the network when you game, or creating multiple SSIDs on your router and then severely restricting other WiFi users so you have maximum performance on the one you game on.
That was a trace route with a download running lol, my ping was fine