Steps to debug hardware issues of your touchpad:
- Update your system!
- Boot other GNU/Linux live system to see if touchpad there works.
- Check if the back cover screws are tightened.
- Open the back cover, inspect the FPC cable for bents and damages, check if it is connected properly to the touchpad and to the motherboard, reconnect it.
If nothing helps, contact @support to ask for RMA repair.