HTC — mobile handset problem

Dear Sir, This is to inform you that My Self Pratyush Singh has purchase A mobile HTC 816G (New Edition 16 GB) which was not working fine & I submitted the same on 11 may 2015 at your service centre & which I receive after several calls on 15 June 2015 but when I check it again the ringer of the mobile was not working which when I complain to the service centre manager Mr. Abhay I get the response that I shoudl keep the set with me & they will resolve the issues within 72 Hrs but unfortunately today is 21 July which is almost 1.5 month pass but no response or result is generated till time. I may request you to kindly do the delivery within 24 hrs or return my money otherwise I will be bound to file RTI for this and Complain to consumer forum for the same. Am awaiting for the needful revert from the prestigious company.