Praise be to Allah, the Lord of the Worlds; and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
Dear Sister,
You should know living in a non-Muslim country is not permissible as a general rule. It is only permitted for the one who is compelled to live there for legal reasons or being a native of that country and can not migrate from his country. For details please read the following Fatawa: 81464, 81642 and 82581.
So, if you are not compelled to live in this non-Muslim country then the only way to protect yourself from being humiliated, making joke or any other kind of harassment is to migrate to any Muslim country.
If there is any dire necessity to live in that country then we advise you to be patient, trust in Allah, do not give up implementation of all Islamic rules and remind yourself of what had happened to the Prophets of Allah.
The nation of the Prophet Nooh () laughed at him and made fun of him Allah Says (interpretation of meaning): {And as he was constructing the ship, whenever the chiefs of his people passed by him, they made a mockery of him. He said: "If you mock at us, so do we mock at you likewise for your mocking.}[11: 38].
The Prophet Ibrahim (Abraham) was thrown in to a blazing fire. The beloved Prophet Muhammad was severely tortured. Once the non-believers put dirty fetus of a she-camel on his back while he was prostrating in K'abah. When he went to Taif to call people to Islam they humiliated him and induced children and a mob to throw pebbles and stones on him till he was injured. All these trials and adversities did not stop him from implementing Sharia.
We apprehend that if you uncover your face, relying on the opinion of some scholars, this might not stop your hardship since you have become known to these people and they might not leave their bad practice towards you. So, if they observe your strength and firmness in your religion and your boldness to face them then they may cease teasing you. Moreover your firm perseverance might be a reason for many people to embrace Islam.
But, if you can not bear these problems then you may uncover your face, according to the opinion that permits doing so. If you uncover your face you should avoid using make up, and all perfumes since they may attract unwanted attention.
Allah knows best.