Poor Vodacom Customer service

Purchased a router from a Vodacom store in Middelburg mall in Mpumalanga returned the the router a month later because it was supposed to have been 10 gig day and 10 gig night but found out it was 5 gig day and 5 gig night anyway that was the 14th of February 2017. I was given a cancelation letter from the Vodacom shop and router was handed back to them and contract was canceled but this didn't happen because I found that Vodacom was still deducting the debit every month 6 months after cancelation. After putting a stop order on my account I approached the mangeress of the store Ciska Swart and she sed she will deal with the matter and will take it up with head office this is August 2017. After numerous attempts visiting the store with no communication from Ciska I was promised that the matter has been taken up and that I must just wait it's February 2018, Still no communication from Vodacom I start writing messages to the customer care and calling but still nobody can help me they say the store has to sort it out. Get a call from Vodacom attorneys on the 23rd of April that the account is handed over and that I'm on ITC. I don't think it's fare that a company like Vodacom can tarnish a person's credit score and name like they did mine, I want nothing to do with Vodacom ever again they have managers that are *********** and shouldn't be in the positions they in if a simple matter like mine couldn't be sorted out. Been a loyal Vodacom user for over 20 years and this how I get treated thanks Vodacom.