false advertising

in September last year I took out a contract(uchoose 150 with a blackberry Z3) and this contract also came with blackberry bundle with unlimited bbm text has advertised in the contract booklet,but today I learnt that I only get 200mb of data per month for bbm,i was not informed of this when I signed up for the contract,<br> <br> why did Vodacom advertise unlimited bbm text but only allow u a 200mb cap???<br> <br> im still waiting for a reply from Vodacom,its gone more than a week now,i think I wont be paying my bill till this matter is resolved