Amazon refused refund, kept money Seattle Washington

I ordered one can of spray adhesive from Amazon. They sent three. I called customer service to see about a return, and a refund for the two I didn't order. Was told, " We have no way to send a return authorization, becasue those are hazadous materials". I replied, " Well, you sent them to me somehow. Why can't I send them back the same way". My answer, " We are so sorry, we just have no way to have you send them back". It was like talking to a robot. Maybe I was, who knows. I do know it's BS. If they can send something that's " hazardous," they can have it returned the " same way!!"