Some more information about your situation would help.

What is your product?
What problem does it solve for buyers?
Do they acknowledge that problem exists, and value fixing it?
Are they willing to trade money for your solution?
Do you have a "ladder" for people to buy increasingly valuable things from you, or are you trying to rely entirely on revenue from this one thing?
Do you have Traffic and Conversion tools in place?

You are asking us to diagnose a situation, but just like your doctor not being able to diagnose what's wrong if they can't see you or hear fully what's going on, it's pretty tough to blind.

Only two components or issues exist when it comes to Sales: Traffic, and Conversion.

I don't care how great your Conversion tool is, or how great you believe it is--if you don't have a high quality Traffic source hooked up to it, the Conversion tool is basically useless.

So where are you getting leads (potential buyers) from? Are they pre-qualified for your offer (do they have a want or need, at least, for what you can give them)? And in what quantity are you receiving them into your funnel?

Each business needs four systems:

1. Lead Generation
2. Qualification
3. Closing
4. Fulfillment.

How well are you doing on all four of these?

It's very common for a tech guy to rush out and drop money on the development of some brainwave they had. Unfortunately, you cannot ignore "business" in the hectic race to bring a product to life. If you've created something nobody wants, or nobody understands, you've wasted your resources.

I recommend these Sales Tactics videos I've made about SaaS; there are links to written blog posts in the video descriptions if you would rather read than watch and listen:

https://www.youtube.com/watch?v=9MGF-C0GPQY

and

https://www.youtube.com/watch?v=nDZQ_8Srt7g