Unwanted subscription

I bought airtime yesterday and it was R67,90 and all of a sudden it was R 50,69 please don't ask me how. Anyway I bought again R100 just to buy my data and surprise " I am subscribed " to SPY that cost me R15 a day just for "ticking on internet" or replying "yes" or subscribe, which I never did. This 31050 did not me help at all When I buy m airtime I know for what. I have NEVER subscribe to anything and still want to buy my1 gig or change the Network to Telkom. I am loosing at Vodacom and it's not the 1st time. I had enough cos when you are a reliable customer they can pay u back with sh***t on a golden platter as they think about money. For the couple of months I tolerate Vodacom and its enough 'ICASA' here I come.