I was working as a freelancer during my free time for a client overseas, I was programming in a framework that isn't very popular, so there aren't many programmers doing freelance for this particular framework.
I did a few jobs for him and his company over the past two years and I hade never had a problem with him paying me.
The last work i did for them was in November of 2019. I made an invoice and send it to him, due January of 2020.
I waited two months and received no answer. Then COVID hit Europe.
A month and a half ago he asked me for a new invoice in order to make the payment, I sent the invoice but he has stopped responding to my messages.
I submitted two invoices so far and have received no payment. I am sure that he and his company continue to work because they post regularly in the forum of this framework.
How can I proceed?