Mercari complaint: MAIL FRAUD

2 SAUCEPANS WERE SOLD TO A CUSTOMER ON MERCARI. ITEMS ARRIVED AND WERE DAMAGED BY UPS. CUSTOMER FILED A RETURN WITH MERCARI.. TO WHICH MERCARI DID NOT SEND HER A RETURN SHIPPING LABEL AS CUSTOMER STATED THAT SHE WANTED TO RECEIVE COMPENSATION FROM THEM AND KEEP THE PANS AND NOT RETURN THEM. WHICH THEN SHE SHOULD HAVE RATED MY SALE AND MY FUNDS BE RELEASED. SHE NEVER DID THAT WHICH MEANS I CANNOT RECEIVE MY FUNDS. CUSTOMER REFUSES TO RATE ME TO RELEASE MY FUNDS AND MERCARI KEEP THOBBING ME OFF WITH GENERATED MESSAGES THAT THEY WILL GET BACK TO ME. BUT NEVER DO. I HAVE TOLD THE CUSTOMER TO RETURN MY GOODS OR RATE ME AND RELEASE MY FUNDS CUSTOMER HAS NOW BLOCKED ME.AS I BELIEVE SHE THINKS I AM GOING TO GIVE UP AND SHE GETS TO KEEP THE PANS! AND THAT IS NEVER GOING TO HAPPEN! AND MERCARI DO NOT REPLY! THIS IS DISGRACEFUL AND I BELIEVE THIS IS ALSO THEFT! PLEASE HELP!