I think you'll find that these are highly individualised and calibrated to each user's gait, tone, nerves, ect. It would be next to impossible for one person to use another's walkaide without adjustments by a trained Walkaide technician. Why not go back to where you purchased it from and see if they'll offer you at least a partial refund?
Be who you are and say what you feel because those who mind don't matter and those who matter don't mind. ... Dr. Seuss