Account not updated on ITC

REcently I have tried in vain to get Cell C to rectify the error they have made. IN 2011 I had a contract, but closed it in 2014. ON my ITC report it shows it was paid up in 2015 only, and then eventually only closed in October 2016, two years later. I have contacted them, emailed and still this mess is reflecting like this on my ITC. I cancelled my Vodacom contract the same month as this one, yet Vodacom isnt even listed on my ITC Report. Tried getting through to their legal department, but was on hold for an hour. Cannot even begin to describe my frustration now.