Upset

Hi, woke up this morning to see that my Vodacom debit was changed from R55.00 to R219.00. I went to Vodacom in Pinetown only to be informed that my contract had been upgraded. I knew nothing about it and regard this as theft. I now get R5.00 extra minutes but have had to pay R150.00. How can they do this without my permission. I am going to lay a charge of ***** against them. I wonder how many others are caught by the same ****.