Why, does one of the essay writing companies owe you any money for your writing service? :) Right on the money. Academic-research is yet to pay me for my services, the dues are way over $ 1500. I have given up on them.
How long has your money been pending? Most companies have a tendency of holding money belonging to writers so as to protect themselves against future disputes. The more shaky your writing looks, the longer the time they will want to hold on to your money. I am not defending Academia-Research but it is nice to be honest because most of them end up paying, anyway.