Myntra.com — Product is on hold due to false accusations

My return is put on hold. I order shoes from myntra with order ID (119587688871785861403). The shoes were brand new with all tags but due to large size i posted a return request. My shoes were not dirty as i didnt wear them outside but the pickup executive told they are dirty and please return them under category o[censored]sed product received. Later he itself put my shoes on hold. Shoes are crystal clear and new. I just want to return them because of bigger size but myntra executives always say to my query that they are given you brand new. I accept that they came to me as brand new and yes they are brand new now also but i want to return them due to misfit.
Kindly help product is brand new with all intact.