Being gaslit by dispatch company?

For a few years now during the summer I never was asked to work and I was never asked to sub during the summer holiday. But I always got a reduced salary. Last year I was asked to work and sub even though I am not a sub. I said something about it. And this year I got an answer about it.

They said that we were always on call, and during the summer we were never off or expected to not work. This is a lie. I remember on my past schedules they would just be marked blank and I would continue to work in September.

What happened for this change and why the lying? Do they just not want to hire actual subs?

by AdUnfair558