Background
I work for various marketing agencies. The various agencies get different contracts from different clients who want their products promoted. Most agencies give only a few hours of work each week, so it's common to work for more than one agency at a time.
I've been working for Promote Me (name only used for convenience) for a little over a year now. There have been several changes in management. At the beginning of this month we got a new manager. I have had a few incidents with her. Being new some incidents are expected but the fact she doesn't explain, acknowledge or apologize is a problem.
As a brief example: she asked if I left my shift. I said yes. She told me she hadn't told me I could go yet. This was a new rule to me and I told her that the instructions I got said I could leave when the work was over. She asked me who told me this and I said the previous manager. She asked if I had just called him. I said no, I've done this job before. This seems obvious - if she thought I was new then she would have given me all the instructions. I asked her to confirm if I should always check with her before leaving and she simply didn't reply.
Though she's knew to this position, the previous manager said she's done this work before. The work is very independent. I often don't work with other people and my only point of contact is this manager (who I often don't have the chance to meet face to face).
Main Question
The new manager sent me a text message asking what my availability is. I told her all of it. She replied by text "great, I booked you for these days. Please keep them open".
We have an app that has our shifts with all the info (like time, date, product and location) and we have a shared online calendar for this too. Aside from the text message, I have no information and it's not on the app or calendar. So I don't feel this is official. This is very uncomfortable because I'm turning down all other work but am skeptical the new manager has/will book me for all the days (it's rare to get so many at once).
I tried asking her about this but she hasn't replied to my messages. I have asked her about other things and she simply ignores. I contacted one of the old managers and asked her the contact info of her manager. He provided me with two email addresses. I emailed them both asking if I could speak with them over the phone. So far no reply.
I consider this an urgent matter because I need to have enough work so I can support myself. OTOH I don't want to miss a shift I am scheduled for with Promote Me.
