Hi Lydia. I can understand how confusing this can be -- what to do when the person in authority over you is unfair... I've been there before myself.
I cannot tell you what to do here, but I can show you what the Word says, which I just happen to stumble across today. I think this is for you...
Your sister in Jesus - Stacy (from Texas)
18Servants, be subject to your masters with all fear; not only to the good and gentle, but also to the froward.
19For this is thankworthy, if a man for conscience toward God endure grief, suffering wrongfully.
20For what glory is it, if, when ye be buffeted for your faults, ye shall take it patiently? but if, when ye do well, and suffer for it, ye take it patiently, this is acceptable with God.
21For even hereunto were ye called: because Christ also suffered for us, leaving us an example, that ye should follow his steps:
22Who did no sin, neither was guile found in his mouth:
23Who, when he was reviled, reviled not again; when he suffered, he threatened not; but committed himself to him that judgeth righteously:
24Who his own self bare our sins in his own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes ye were healed.
25For ye were as sheep going astray; but are now returned unto the Shepherd and Bishop of your souls.