Unauthorized billing of Telkom

I signed up end of August for Unlimited all hours WiFi deal at Telkom for R449+R70 =R519.My first account was correct wit R99 activation fee. My second account R978... they add daily subscription fees that I did not request and the simcard stayed in the Rooter at all times.I sent in an query,no one came back. My second account R2 215 ,my query still not look into and I let them discontinue the service until problem sorted out. Went to Telkom office,the employee said I'm not the first customer that was billed subscriptions not signed for and the employee on the customer service line whom I spoke to also said other customers had the same problem and the customers just had to pay the bill. Who benefits from this if the customers did not sign up for this? Money is already so tight.