Been there done that.
Have her contact the local inspector. based on the red tag she should then contact the State Attny Generals office. Most states are big on fraud against older home owners.
They vote.
Local inspector if provided with documentation i.e. invoice and copy of the check used for payment, depending on license laws can go after the installer. Findings from that can be used by the state in the fraud charge.
Owner can get money back and hire it done right.
Installer can get fines and establish record of poor work.
Worse case scenerio: Owner is still reponsible to fix the defects if the installer disappears.
Alan--Inspector.
