RMSC(Retail Mobile Content Services)

<p>Please help me! I once received SMS advertising free airtime stating I receive free if I reply yes of which I did there was no terms and conditions, now suddenly when I recharge my airtime disappears, I called vodacom they gave me numbers of RMCS they send messages that I logged call to cancel contract of which I didn't apply for, apparently I now have contract... Please help me I want out.</p>