Microsoft — Company is unable to repair phone even in 20 days

Website:

www.microsoft.com/en-in/mobile/support/contact

I submitted my Lumia 930 phone on Microsoft Device Care, Tilak Nagar, New Delhi. The job card no.[protected]/151128/002 At the time of submission they assured it will be repaired in 10-15 days, but even after 20 days it is still in some head office with status part not available. Since the company is not able to repair the device they should offer me a new device. I contacted the service center and the Microsoft customer care and registered complaint [protected] on 18-dec-15 but still they don't have any answer. This is a failure of the company that they are not able to repair the phone in the given time but they are not able to accept it. I want my fully functional device back or a new device.