Office circular to contractor's to vacate the plant site with their manpower?

Can anyone help me to write a office circular to contractor's to vacate the plant site with their manpower.

Please issue Contract Termination Letter referring to Termination Clause of Agreement with Contractor.

Please at first go through the contract note issued and the clause of termination, issue accordingly, in case you have not satisfied with any of the issues or work contract failures, you can issue such notice with relevant clause there is nothing can be issued without proper notice...