All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
If this marriage took place without the consent of your guardian, then it is a void marriage because the consent of the guardian is one of the conditions for the validity of a correct marriage; for more benefit on these conditions, please refer to Fatwa 83629.
Specifying the dowry and announcing the marriage on Face book does not make it a correct marriage. If both of you want to marry, it must be with the consent of your guardian. But if your guardian refuses to marry you off and a priest marries you off, then the marriage is valid.
Nonetheless, if we presume that you embrace Islam – and we ask Allaah to facilitate this for you – then it is not permissible for your father to marry you off. In which case, you should take the matter to a Muslim judge or whoever acts on his behalf in non-Muslim countries in order to marry you off; for more benefit, please refer to Fatwa 84315.
On this occasion, we call you to embrace Islam which is the true religion by which Allaah abrogated all other religions. For more benefit about Islam and the evidence that Islam is the religion of all the Prophets, please refer to Fataawa 81979, 85234 and 88906.
Also, for more benefit on the evidence that the Christianity of today is a false religion and that there are contradictions between the Gospels after being tempered with by people, please refer to Fatwa 85307.
Allaah Knows best.