Incorrect Billing and Poor customer service

I have a contract with Vodacom and complained before about my contract without any success. I took out my current contract in November 2016. My problems started shortly afterwards when Vodacom deducted more money than what our agreement stated.Instead of deducting R512 the amount of R662 was deducted monthly. I contacted customer service several times and every time my calls were transferred to the Accounts department.Nobody at the Accounts department ever answered my calls even though I waited very long each time.In October 2017, I decided to stop payments and did reversals at my bank for October 2017 and November 2017. By doing so I was hoping that I would be called by Vodacom to determine my reason for not paying my account. Needless to say nobody called me.Vodacom then proceeded to block my line.Instead they call me and when I answer it is a recorded message that plays instructing me to call Vodacom. I cannot speak to a machine and because of Vodacom a default listing is showing against my name at the ITC.I have no choice but to approach the ombudsman in this matter should it not be dealt with to my liking. I feel disappointed in Vodacom as I have been a loyal customer for many years and this is a first that I am so dissatisfied.I have already bought a simcard from another network which I am now using since you blocked my line.