Termination prior to contract ending (ESA)

Hey everyone!

So i need some help in regards to being let go prior to my contract ending. Here are some facts:

- Position was an 18 month mat leave

- Position started on June 3, 2025

- Position end date was "approx." Oct 12, 2026

- Manager reached out in an email stating that come June 9, incumbent would be returning and my contract ends on that date.

- When asked about lump sum or bi weekly payment, claimed ESA would pay out 2 weeks.

- Work in medical field and am under a union (CBA makes no stipulation that i can find regarding this)

- Spoke with legal friend who said this termination has nothing to do with the ESA, but about unhonoured contract.

I feel like i dont have a case here. I would love some more opinions and let me know if you need more questions!

Thanks a bunch.