Horrible service from Vodacom

What a horrible experience with Vodacom!!!! First there was an upgrade ***** from my account! After investigation which took abt 2 months without m being informed during da process, until I decided to call them then I was told yes it was internal ***** they will cancel dat upgrade. Then after dat incident I requested to cancel my contract anyway I was finishing dat month. The lady who helped m assured m it was done. Then I think two weeks back I get a message on my phone from to contact Vodacom. When I phone I'm told I am owing R2k+. I ask da ladies after being transferred back and forth they say bcos I did an upgrade I'm telling them it was ***** I was asked for da reference of which did I hv deleted my emails they would hv said I'm lying from how they sounded. Of which I then gv them then after dat da lady says ok nw she sees it bt still ur contracts were not cancelled. Well to cut da story short coz it's long. Vodacom pls AGAIN cancel my contracts and reverse those charges or penalties whatever it is u say I'm owing listen to your voice recording according to m I cancelled my contract in July as per da lady who helped m telephonically. And I need feedback please.