I think they brought it to a court, and won to cancel the revocation of work permit by WDA. This might be a different case, but very similar situation.
Article 73 of Employment service act
Where any of the following circumstances has arisen or existed with respect to a foreign worker, the employment permit therefore shall be annulled:
6.Other than the above, the employed foreign worker has been in serious violation of applicable laws and regulations in the Republic of China; or