whatever case you file, you will need evidence.
i do not recommend a criminal case because these acts were committed in a foreign country. philippine criminal laws are applicable only within philippine territory. one possible case is violence against women under ra 9262 because one of the elements, violence, was experienced here, but this can only prosper against your husband.
it may be that what they are doing is punishable under the laws where the are staying, but i regret i cannot advise you on foreign laws.
you can also explore filing a case for damages against the girl for meddling in your family affairs. the case can prosper even if she is outside the country if you publish the summons, but you can only execute against her property here.
i am not familiar on basis, but it appears from the posts of others here that complaints are received at poea.