HTC — Delay in Repair and no communication

Address:

Mumbai City, Maharashtra

we have submited this phone on 11th Feb 2015 at borivali sevice center as both sim slots were having problem in identification of sim . we have been told we will getphone in 15 days . its been 1 month we have not received mail or call from their end on the other hand when we call for update they are continuously saying part is not available and not giving us any date kindly help in this Regards Priti waradkar