MTN ***** airtime....Going back to Vodacom

I've switched to MTN 2 months ago, from Vodacom.. By accident bought a MTN fone...HUGE MISTAKE. Every week my airtime dissapears. I'm subscribed for things I have no idea of..R5 deductions, no cancel options...NO STOP *****ING!! Endless adds which I'm NOT INTERESTED IN. can't wait to divert back to VODACOM. Atheist Vodacom don't ***** our Airtime