TestClear Overcharged me, sent the product late and refused to cancel after I cancelled the order Washington Redmond

Paid for overnight shipping because I was leaving town however they screwed it up and the order was never sent out when promised.  When I called the next day to cancel, they refused and sent the order anyway.  When I asked to speak to a manager, they said there were none and to email support with any issues or complains which I did. 

The same idiot named Becky that I spoke with on the phone also is the one that monitors and responds to support.  When the pkg arrived, it was returned to them unopened because I wasn't there to accept but when it got back to them, they refused to accept delivery.  After doing a Google search I can now see this is a common practive for this business.