So call most valued Vodacom customer

I would like to complain about the pathetic service which I have received for the past year from Vodacom. I have two lines with them and I was considering cancelling the one last year as there was no need for it . Close to the time I was meant to cancel I received a call from the Vodacom sale department to say that I am eligible for an upgrade and they have a "brilliant deal" I then informed the gentleman that I actually want to cancel the contract, he then convinced me to take a data package of 5Gb day and 5Gb night at R99 a month. The following day I received another call from another sales person from Vodacom also to upgrade that line I said no I already upgraded but he can perhaps call me next month as I have another line which is due the following month. He then did a few things and I upgraded earlier taking a two for one deal.

This all sounds wonderful until I get my first statement which reflected a handset cost on the data line, I queried it numerous times and every time I get different answers, the first being no you took a handset(which I did not), the other is no you were on a laptop deal which expires in 2019 ( I was not informed about when the 1st gentleman called me) so essentially I am paying off that handset even though I upgraded, they told me that I would have to pay it off until May) The other day when I enquired about it, I was informed they cannot see anything on the system. So my question is "What the hell is going on on my contract as I would like to cancel all my contracts that I currently have with Vodacom. "