Feeling extorted by UPS. I bought some window blinds on Amazon.ca and I guess the seller used UPS. My Amazon invoice states standard shipping. A month later UPS sent me a bill for $22 for shipping. I ignored it since I did not choose UPS and had chosen standard shipping. If the seller used UPS they should pay UPS. Then UPS sent it to a collection agency and threatened my credit rating. This seems like extortion. If a company in China used them and did not pay, how is it my responsibility?