Really poor network quality

I have been a loyal Vodacom subscriber for many years now, i have taken contracts with 3 other network providers over the years as I did not qualify with Vodacom yet I chose to keep my Vodacom number and stayed loyal although I have been advised many times to port my number to another provider, I spend a lot of money on data a monthly basis as I have kept faith in Vodacom using my existing mobile number yet I have wifi at home, wifi at work, and contracts that come with a lot of data, I have come to a point whereby I am ready to leave the network for good as I have been purchasing data bundles that I am unable to use due to the poor network quality, my data bundles expire without me using it to my satisfaction, it is so frustrating that I have damaged my own device and I am beginning to hate your network. Im sure that many other South Africans are having similar issues with your network and if this is not fixed you will be losing a lot more consumers.