Online queries ignored and no contact details

Over the past month and more I have submitted queries, regarding fibre availability to my home, on the Openserve website. Each query, despite a response that "We will contact you soon", has received no response. I also submitted a post on the Openserve Facebook page a few weeks ago that has also been ignored. Otherwise, I have found no other way of contacting Openserve as there are no contact details on the website.