Vodacom *****ing their customers blind

Contract renewed 2 years ago over phone after weeks of sales calls from vodacom. R69 per month. 2 years expired - Vodacom doubled subscription - no warning -no explanation of this money hungry practice when they sell you the product. Companies like this( i understand that this is small Fry comparing to what they get away with on a daily basis) should not be allowed to operate. Unfortunately they are part of a monopoly and us SA citizens will NEVER have the guts to say NO, NO further. Imagine 1000 000 people refusing to pay their rediculous premiums for just one month. They will immediately change!!! I just had a call from them 3 days after i requested an imediate reply. The poor girl on the other side did not have the info i gave originally and hanged up when i blew my lid and said the word \****". I know i should have kept my cool but after so many incidents after so many years of having to hold for hours on end on a \""customer Care\"" line not gettinmg somebody that can speak good english"