They us perform an HVACR service call at Pet Valu in Chillicothe Ohio. I submitted online invoicing following their instructions. When 60 days had gone by our AR dept called them to find out about payment and they stated the person that received the information was no longer in that dept and we had to submit everything over again. We were not pleased but resubmitted this information. We verified that they had received the information and 3 more months has passed. STILL NOTHING!