I am sorry about your unpleasant experience. It is a good thing you contacted the seller. Give the seller about 48 hours to respond, since it is the weekend.
Although, a good seller will reimburse the return shipping cost if the item is not as described, the seller is not obligated to do so. Base on Buyer Protection Policy, buyer is responsible for return shipping even if the item is not as described.
Exactly this. I was refunded by eBay buyer protection but had to ship it back.