I've spent around 3.5 months developing a SaaS app for a client, for which I invoiced him on a month per month basis with a 31-day payment term.
For the first invoice, there were no issues, but the second, third, and four invoices have not been paid (in full). The client kept coming up with excuses, demanding more to pay an invoice and when I did give in to the demand, he still didn't pay.
When I stopped, the app was pretty much done. It is currently live and even has a pretty large client base.
In total, I have worked roughly 2 months for free. I'm 99% sure I can mark the invoices as uncollectible, so I'm trying to figure out if there are any other ways I can make some money out of it, so I'm trying to figure out if I am allowed to continue the development of the current codebase and launch the product myself?
I can't find a concrete answer anywhere, so I figured why not try if anyone here can point me in the right direction :)
Thanks in advance.