Poor service

Nine out of Ten times I try to phone someone or they try to phone me there is just dead silence. It not just my phone. Aware of a number of people with same problem. Had years of problems with Vodacom wifi connection. Despite numerous complaints nothing was done. Now use a different Service Provider and have perfect signal. Will change all my contracts to another Provider when my contracts expire. Vodacom simply do not care. I do not even try to complain anymore.