Vodacom,Power to over charge customers

To whom it may Concern. I app**** for for a new contarct about a year and half ago for R249..having in mind I have 2 contracts with Vodacom.Subscription of R99p/m and R249 p/m for the other..A 2 year old will work out the math of R349 p/m.But According to Vodacoms Billing department they are charging me R400p/m .from the word GO Vodacom has been over billing me ,when I go to the store to Query they keep logging me a Credit which is unacceptable. I want my money back for all the over charges and cancel my contract with immediate effect.

Call me of you man enough ********** .