Floodlight Cam Wired Pro offline

Hi, it's disappointing that Ring does not have a support email address that I could post a message to, I would have preferred not to post this for everyone to see in case it puts people off the product. I am in Australia and don't have time to try to call the international support line. I am having trouble with my brand new Floodlight Cam Pro wired camera frequently going offline. Initially I was receiving a weak signal message which was resolved by me putting a dlink DAP-1520 wifi extender close to the camera, linked to my Google mesh network. The wifi is now excellent in that location, however the RSSI is still showing a poor signal of -69, with the camera frequently offline. Firmware is up to date. I also have the video doorbell 4 which is working well, and not a big difference in distance from the router. I'm hoping to install another 2 of these camera's however will be unable to unless I can resolve this issue. Can anyone please suggest what I can do here. thanks very much