In the past I have worked with ACAS and to be honest if the company isn’t interested then that is that.
Unsure if I have this right to your situation
But a company I had worked for many of years was bought out by Platignum pen group
But we was all different business so therefore we all was individual businesses and run individual
so our terms and conditions was individual to each business.
Unsure if the same as you didn’t say it was under the same name as yours ?