Terrible service towards small business

I moved over to vodacom last month but since I moved over to vodacom I am losing customers and income I run a small one man business and rely on my telephone number to work so that customers can get hold of me I am getting emails from customers saying that they are not getting hold of me they say that my number does not exist but if I call them I can get hold of them. Vodacom had sorted the problem out but within a week customers started complaining again. I am losing income and customers cause my phone is not working vodacom seems not to care about my business. They just want their business to flourish an does not care about the small businesses I want to challenge them to say what do they care about the small business owners?