No response or Help from Vodacom

Good day. I have logged a network problem on the 4th of February 2018. Since then no progress have been made. Im having dropped calls,messages not going thru. Whatsapp messages also not going thru. That's the signal Im having. 20 reference numbers further still no response. For 2 months now Im trying to cancel my contract and no one can help me. The help from vodacom is non existent. Im paying for something that Im not getting. Vodacom also offered to help me change to a different service twice. What does that tell you about their character.