How can I cancel my work permit in Thailand if my previous employer is unresponsive?

PTPA. Hello everyone, maybe someone can help me here. I worked here in the Thai Oil project (cfp) in a subcontractor Korean company under UJV,

UJV withdrew the project because it did not pay wages.

Now that I have been hired by a new company, our problem now is that the work permit of my previous company can not be canceled because there is no one authorised to sign the clearance, the two managing directors have both resigned. our company already has a case with the Thai labor office. Does anyone here know what other way to cancel my work permit even if there is no clearance from the previous company?

Thank you very much. I hope someone can help me here.