Query on ******* upgrade

I've had a contract with Vodacom since 2011. It was a laptop deal with a modem. In October 2013 I upgraded and took out another laptop + modem which I paid R429 per month but my subscription then increased to R435. My contract end date was on the 18 September 2015, I had no intention continuing with the contract however in the beginning of September I received my monthly statement stating that I had upgraded contract to a 24 month handset @ R400 and uChoose flexi airtime @R350 per month.<br> <br> I didn't authorised for an upgrade to be generated without my permission. On 19 September 2015, I called 082 111 spoke to a consultant called NASIPHI and I explained the situation. She then told me that there was an ******* upgrade generated in my name therefore Vodacom would investigate the matter. She told me to fax a copy of my ID and written statement to *** to inform them of what happened. She told me Vodacom Investigations would contact me in 48 hours which they haven't to this day. She also gave me the following reference number: ***. When I asked for her Surname she declined to give it, saying she isn't allowed to give out her full names. <br> <br> Please assist Hello Peter