Unauthorised cellphone upgrades on my account

In August 2014 I went to my nearest Vodacom shop in Gardens Cape Town for my bi-annual upgrade from an Samsung S3 to an Samsung S5 and also to cancel 2 existing external data ****les contracts which 2 year contract periods were well passed their alloted time. The service was pretty sharp at the shop and everything I needed was effeciently taken care of (and rightfully so as a paying customer). In December 2014 I realise my bills are rather excessive nothing but didnt investigate untill the dbl debit in December 2015(which was also very convenient). So I start investigating. I then realise that the 2 ****les I had cancelled actually somehow without my consent or identification got upgraded to 2 Smart S cellphone contracts. My frustration starts after going to 2 shops (the 1st in the Waterfront then Gardens ) The Gardens store helped and could see that these contracts were **********ly activated and sent an email with my case no from the SAPS. I had to to go back there 72hrs later when I had received no reponse and my phone calls to 082111 also fall on deaf ears. Customer service is non-existent and is a disgrace as Company. An empty-shelled system with no leadership.