I am so sorry about this! Sounds like mom is a bit of a.....moon case lol It's really too bad that she did that to you. It's hard not to be resentful when parents are so disrespectful. I have no advice but to say I'm sorry. I know how hard it is to lose a kid you've enjoyed for long.
Good luck finding a replacement! I know how difficult it can be, especially in such a short time period.