Selling into Bureaucracy

The business I run relies heavily on the approval of those within a bureaucracy (think colleges, schools, HOAs, small local governments, etc.) to operate.

I’ve been running my business for a little over 4 years and my biggest barrier to getting new customers is getting approved by these bureaucracies to serve their captive population (I.e. college students/families, HOA residents, etc.). I’ve had very mixed success, some of the decision makers I’ve lucked out and gotten into contact with and it’s been an easy process and others I’ve been chasing for 4 years with no returned calls, emails or any sort of correspondence and it’s hindering my businesses growth.

Was wondering if anyone has any experience selling into these types of organizations? I know it’s super tough to begin with but feel as if I can do things better.

Any tips/help is greatly appreciated!