As the head of the family. Take the wise decision and cancel this Coway subscription. Understand you may be under xx years of commitment and if you cancel there will be penalties fee.
If your subscription tenure has matured/ended, please don't renew and cancel.
I think the IC verification for new owner is fine, nothing much you can do now. If anything it will be just stealing your identity and subscribe stupid things. A real KYC process is not so easy by sending photo, it will be real time camera and human movement required.