That sounds a bit rude!
What is your ideal atm? Perhaps try and work it out tonight so you have a clear idea of what you want. I would then ring your union and ask them what you are entitled to, especially about being offered hours and then not. I would also be open about your concerns - not sure what your particular entitlements are but I would imagine there may be some flexibility in regards to family needs etc. Good luck!
PS I always need to write the main points down when I get upset - otherwise I get offtrack very quickly!