HTC — Mobile handset

Dear sir, my handset is htc desire620 ime no-[protected] job no-del[protected].i have face an problem in my handset so i have submit it on sai communication ghaziabad on 19/08/2015. they said that they have given me my set on 1 week but when i call him they said one more week will take to repair your set but after one more week my set is not repair so it was so poor experience in my life with htc so please solve this issue in next 72 hours ravi mittal mb-[protected]