Call Telkom and ask them to do a check on your line. Mine says I can't upgrade on the checker, but the people who did an in depth test on the phone say I have 10mb. Yay!
I'm in The Glen t/h 4Mbps only, last time when i checked (two weeks ago) they said the exchange hasn't been upgraded yet. This is going on from august now, pathetic. Going to Bulgaria in april for few weeks will enjoy 50Mbps optical the slowest that you can get on optical. There is a special at the moment with the ISP that my parents use 30Mbps R.25 for the first 6 months, next 6 months normal price R.120 you need to sign a contract for a year.