It looks like the last action was your submitted CEQ (which I assume included an assessment of time) was not accepted by the PM and it looks like he has made a PM's quotation assessment which you do not believe complies with the contract requirements.
Once the matter has got to the above stage, however, then the only further course of action is adjudication, as the compensation event would be implemented by the PM notifying his assessment.
From what you have said it looks like the PM's assessment is a bit of a 'damage limitation' exercise, although I would advise reviewing the matter including when you added the activity of constructing a brick panel to your programme and whether this was accepted by the PM.
Once the matter has got to the above stage, however, then the only further course of action is adjudication, as the compensation event would be implemented by the PM notifying his assessment.
From what you have said it looks like the PM's assessment is a bit of a 'damage limitation' exercise, although I would advise reviewing the matter including when you added the activity of constructing a brick panel to your programme and whether this was accepted by the PM.