Update...
Peter, the owner of Beyon, has crawled out from wherever he was and called me. I will not bore you all with the 'excruciating minutiae' of his many reasons for not calling me back or paying me... Basically, he claims all of his paperwork, pods, invoices, customer files, etc. were taken by a rogue employee and that has made it impossible to bill his customers and collect payment. He promises he will pay me as soon as he can get all that stuff back etc, blah, blah, blah...
I will be calling his customer today to find out if they have paid him for my work yet.