Very disappointed with Davidson & Sons, have used ...

Very disappointed with Davidson & Sons, have used them for years, specifically working with Al who has been great, through my 2 companies. Al moved to a new company last October and even though they were sent the power of attorney information stating I would no longer be using them, they keep hijacking my shipments and trying to bill me for them or provide false documentation for supposed outstanding invoices that are from 2018. They do not reply to me or acknowledge my emails, when I try to get them to stop, and not sure how it is legal to do business this way. Maybe a google review will get them to start acting how a business should. No means no.