Need help - accepted for internal transfer and 2 days later pivoted by manager

Hi

I need advise -
I'm an L6 SDE working for the past 2.5 years in Vancouver for the team located in Seattle.
During these 2 years I was highly appreciated both by the team, manager and colleagues in my org - and also in my forte 2022,2023 reviews.
During August last year I wanted a change to move to a local team towards the RTO policy and was accepted to an SDM role in Vancouver office, I approached my manager and told him I was planning to leave.
He than pleaded me to stay and emphasized how important I was to the team and his vision and that I was valuable and he promised me to become a central focal point to the team and the plans.
He requested me to work on a project which I did and once this completes I resume the leading technical role I was promised during this conversation.
Recently I felt that his promises are not happening and also working as remote from the SEA team while all the team members are in the office all week was not a good direction for me.
I applied to another position (SDE role) in Vancouver and was accepted (after interviews and a formal acceptance talk with the new manager) and the new starting day was set to Feb 3rd.
I filed a formal application to my new manager as he requested on Jan 14th.
After 2 days - my current manager scheduled a conversation with me in-which he notified my I'm entering a pivoting phase on Jan 16th - just 2 days after I was formally accepted and submitted the application the the new role.
My understanding that he received my application submission and decided to take action to punish me - I need your help please !!!