66 months contract for a HP laptop and 2gig Data router

Me and vodacom have 2 different New Activation Quotations. Mine states that my contract period is 24 months that starts from 2017.03.08 and ends 2019.02.26, but till today my account is still being debited. When I call I am told that i was suppose to call them a month before my termination date to cancel my account with them that's why my account is still being debited as I receive data every month.

But now only to find out that Vodacome has another New Activation Quotation on thire system that I know nothing about. It says start date is 2017.03.15 and termination date is 2021.12.28, and Contract Period says 36 months. Which all of this is new to me. Only to find out that thire dates are making this contract a 66 months deal. I mean who pays for a HP laptop with a router that only comes with 2gig data for 66 months?

I am really disappointed in Vodacom and its sales reps and Accounts department.