Scammed by their sales employee

They sent out their sales employee to give me a quote for installation. Turns out their employee scammed me while on company business and they refused to take any responsibility while not even directly telling me why they fired their employee. They said they would do an "investigation" into the matter but I haven't had any response from them in 2 months or any reason as to why their employee was let go even while following up with their new head of sales. I was even willing to still join them if they were willing to meet me half way with the installation.

Terrible.