Keeps on overcharging my account by twice the amount

<p>Their call in support is useless, takes forever to spea to someone and then have to wait forever again to be transfered to the correct consultants.</p> <p>I upgraded my phone in November 2016 and was supposed to keep on paying for my old phone up to Feb 2017, I am still being charged for it. My package should cost me R438 per month, but up to date not once did it ever get close to that number being overcharged by double that and now this month I was invoiced for R892 which I paid on 22/03 only for another R240 ran to be taken out of my bank acc today and the consultant says their is even more that they want t debit me, and every time I get abt halfway with my consultation they drop the call</p>