I am a subcontractor and I am trying to get paid for a residential job that was done in 2019. The owner was my fathers friend but he passed in 2020. My brother and I now run the concrete company and because my father is no longer here, the home owner believes she has the right to avoid payment. Due to their friendship, there was no formal invoice sent to the owner initially, just word of mouth. Like previously mentioned, since my father passed, she no longer wants to pay. We sent her an invoice for the job back in December and again in February through email and also had it sent via mail. Tried messaging and calling as well but she has blocked us and now my brother and I need guidance. Is there anything we can do?