I am sorry to hear that you are experiencing issues with a Restricted Products Complaint. Normally, these are not dangerous and will not cause your Seller Account to get deactivated. You should be able to just delete the listing and wait for the defect to disappear after 180 days.
Alternatively, if you wish to remove the violation, all you need to do is to tick all the boxes and then proceed further and submit. The defect should be gone within 48 hours.