Bad service

I called Vodacom spoke to Nonhlanhla requesting to cancel one line which she did not and i called again she promised to rectify and i called for the third time spoke to someone different she promised it will be rectified now im sitting with an invoice including the line that i wanted to cancel can i have my call recodings this is more than a bad service actually i want to cancel the whole contract i cant be calling vodacom daily. Im tired Vodacom and Nonhlanhla im tired no one is making me a favour and im not making anyone a favour can i cancel everything please.