Good luck getting paid from these people. They've ...

Good luck getting paid from these people. They've acquired a handful of different companies and no one seems to know what's going on. I've called multiple times and I keep getting transferred to different offices who are all telling me that they are not responsible for our payment and to go call another office. I've spoke to 4 offices in the past hour and no one can seem to find out who is responsible for paying us our $4600 invoice.