Telkom's unfair usage policy keeps changing

I have an uncapped 4 meg line with telkom. Around 5 months ago they throttled my speed at 250 Gigs, the month after at 150 Gigs, the month after at 100 Gigs and this month at 60 Gigs. This is totally unacceptable as it seems they can decide randomly what they see as unfair usage. When I phone they say there is no contact number and no person I can speak to regarding this, I just have to accept what they decide each month.<br> <br> Several game updates also load from multiple sites and are sometimes up to 50 gigs, also download accelerators load from multiple sites and some legal game updates are torrents so what the heck must I do?