@Ian_McGee, sorry for all the inconvenience the RoboVac caused! Please be assured that we always stand behind our products and we are happy to assist you with an exchange if the problem turns out to be with it.
We understand you have tried the solutions, but could you please tap the wheels to see whether they are stuck? And if necessary, remove any hair and debris from them.
If the problem persists, would you send us a short video showing the problem if possible so we can better identify the issue and offer you more troubleshooting?(If the video is too big, could you please upload the video to the Google Drive or Dropbox and share the link with us?) We are glad to arrange a replacement for you once we confirmed the issue and your order detail.
Could you please contact us via our email"firstname.lastname@example.org"? We appreciate your time and look forward to hearing from you.