Welcome warmly to BM! Please rate 5/5 for my ideas and reference.
Steps to implement when a management strategy is not working definitely might likely involve taking a step back, breathing, counting silently from 1-10, reflecting, and trying again but in a different way. If all else fails, then moving to plan B might be needed.
When my management plan failed, I would also go back to the basic ...
200 words and two research references briefly recommend some steps to improve classroom management, especially when a management strategy is not working.