Vodacom Network seriously inferior

Vodacom not suppling as per service level agreement. reception terrible with multiple dropped calls outgoing and incoming. poor excuse of apparent barred numbers and diverts. have checked both and no barred calls or diverts to anything but voicemail. cancellation requested then i must pay upfront for a line that is useless and cant be used!! as i sit here there are two vodacom lines that are not working !! dont blame it on the phone or something as i have two lines not operating not just one.