selling unlimited mobile contracts under false int

i bought the telkom mobie unlimited for bussines and when halfway in the month the internet is as slow as can be.<br> the ad they advertise everthing unlimited broshures ads but i phone them and now they said up tp 10gb then its slow down but still paying R1599 every month. they say its in the terms and conditions but nowhere i was told about or advertise . the terms says telkom reserve the right to a fair usage .<br> <br> I am not happy at all and i think the public should know about this before buying for that is not unlimited but capped