Ebay.in — The refund claim has been rejected

Sir, i bought a silver bangle from ebay for my sister for Rakhshabandhan. As the size was mentioned in the description of the product, i still ordered it, as i gave it to my sister on occasion of rakhshabandhan, as she tried to wear it, the size was small and would not fit in her hands, so i raised a ebay gaurantee claim and told to make them a refund of my amount, but my claim was rejected stating that size issues does not come under their gaurantee claim policy. I even contacted the seller for it, and they told me that nothing can be done now, as the claim was rejected. I talked to ebay executives and they told me that now they cannot open the gaurantee claim again and nothing can be done now. Sir my money has been wasted and i can't use that product, so what can i do now for this matter. I would like to file a complaint against ebay India for harassing me and not resolving my issue.