@Anup_S, sorry to hear the inconvenience our RoboVac 11 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 also tap the bumper and wheels to see whether they are stuck? And if necessary, remove any hair and debris from them.
If the issue can’t be fixed, could you please contact us via"firstname.lastname@example.org"? We will help you replace or return it once we confirmed your issue and your order detail.
Lastly, there is a gap between the six sensors on the Robovac’s bumper, so it sometimes can’t sense the thin chair/table leg. Sorry about that, but we will forward this issue to our Product Team to make it better in the future.
Appreciate your time and we look forward to hearing from you.