Snapdeal.com — regarding returning of the product for mismatch size

Dear dir, I ordered a combo pack of St. Martin shoes( order no.[protected] and order id [protected]). At the time of delivery i found that the size is mismatching so i complained regarding the same.Since 3 days are passed but no action or information are taken on the topic. Please tell me what steps do i require to get rid of this & now i just want my money back.