Obtaining relevant Information from the Company

I have a property listed on Expedia. Not for the 1st time a 'discovered' a booking made by them that they had not emailed me about. It is very difficult to get any person-to-person contact with Expedia. When I eventually got to speak to someone at their Call Centre, it seemed clear to me that they were unable or unwilling to understand my query and had a 'cut and paste' approach to answering my query. I then sent a message and despite their assurance that they would get back to me within a couple of days, I have had no response from them or from the guest who will be adversely affected by the incorrect booking. They keep using 'catch phrases' such as 'partner' but it is clear to me that they do not consider me as a partner