Clarify the information available and review the actual lesson.
If the prosthesis or hearing aid was neither apparent nor disclosed, the lack of adaptation cannot be inferred by that fact alone. The relevant points are the agreed service, the actual lesson and the information available to the provider. An apparent risk had to be considered according to the circumstances.
Next steps: secure the booking, course description, messages, witnesses and accident sequence. Record when the physical circumstance first became apparent.