telkom mobile unlimited deals

I recently upgraded from a Samsung s3 mini to a s6 and the Internet speed is shockingly slow. I called in so many times but no one can help me. It seems they bluff you with unlimited data but gives you a very very slow connection. I appeal to all, don't fall in the trap that I did. My s3 mini was watching faster than my new s6 in downloads and uploads. If I knew the Internet speed will be throttled like the way it is with the unlimited data option, I would never have upgraded my contract with telkom. Very disappointing.