Do you have a website (with SEO built-in), with customer references?
When I was selling enterprise business software and supply chain software I invariably led with good customer references.
I went into IT sales from the IT support area about 30 years ago. You need to develop "hot blood and big balls" so you can ask for the business. People generally find asking for business to be difficult and nerve-wracking but you will get used to it and realise there's nothing to it. Warm them...