Stupid and deliorious

Hi Jet senior management. I received a gift which is a dress it's too small ,I do not have the receipt because it was a gift however all the tags are on the dress and I would like to exchange it for something else your staff refuse to exchange it which is so stupid what should I do with a dress that does not fit. Please get the policy and procedures in order because this is a joke I want to exchange my dress that was a gift for something else . The person who purchased the gift is now overseas how do I ask for a proof of payment now