Unable to provide a reliable service

<p>i have been with Vodacom for 17 years, and the last 8 or so years the service has deteriorated to a point where I can just about not make or receive a call anymore. Wether I make the caal, or if someone calls me, the call is dropped at least 4 out of 5 times, regardless of my location/coverage. I would like someone from Vodacom to contact me so they can cancell my contract due to breach, as they are clearly unable to provide me with the service which I am paying for. In the past I have threatened to change networks when I upgrade, but they tell me they will prioritize my number, but this does not happen.</p>