wrong part shipped, return shipping refused

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This company sent me the wrong part and expected me to pay to ship the wrong part back to them. I was extremely careful to chat online with a representative to determine the part I needed. The wrong part was sent to me. Did Tasca Parts take responsibility for the error? No. They wanted me to pay for the return shipping even thought their policy clearly states the following: "Please note that the customer is responsible for all return shipping costs unless the return is due to manufacturer defect or TascaParts.com error." I have sent several emails for 5 weeks with no response. I tracked down a phone number, spoke to an employee who put me through to a voice mail with the promise, "This person returns voicemails. She will return your call." I received no return phone call. Online chat has not authority to uphold the policy. They just simply place the blame on the customer. Ordering from ******************** was a big mistake.