Vodacom - why do you take monies *******ly?

Vodacom have been “*****ing” monies from me for the last three months. Ported my number to MTN 1 November 2018 and they have taken monies for all three months without providing a service! Surely this can’t be legal? I don’t know how to sort this out they are not even attending to this!!!!!!!!!!! Wouldn’t recommend this lot to anyone what a disgrace when I was a customer since 1994.....................