********** company

This company is a ******* they called me for contract of R230 per month but every month it's been more then that I try to cancel the debit order I can't now my account is 2000 this month as they said I took extra recurring bundles, according to me I call one call then 230 airtime gone so I bought 1 gig data and 100 min meaning it should go of my 230 airtime no they put it additional to my contact try to cancel it for two months now they just escalate it and send me sms its close but when I cal in still the same... I want to cancel this whole contract I can't I must pay for duration of contract but won't get any airtime.