Vodacom is disgusting I regret why i joined them

Two years ago I went to Vodacom Rosebank Mall and took a laptop contract for 2 years I was told at the store that once the 2 years has lapsed I need to phone Vodacom to cancel the contract and I did just that. I had a peaceful 2014 then the beginning of 2015 January Vodacom started debiting my account with R628.99 they did that for 3 months I discovered that on the 23 April 2015 when i investigated the matter i was told that I took a Samsung cellphone \I don't even like Samsung"I was told to go to the Police station to do an affidavit that was done I faxed it then I had peace from April till September. In October I was debited with R436.00 I called their Legal Department just now I was told that I took data I am confused because last time it was a cellphone now its data I wonder what will it be next year"