HTC India — Very slow service

Address:

143001

Dera team,
i m from amritsar
i have given my earphone in your service centre at lawrence road, nehru shopping complex approximately 10 days ago. they told me to collect new earphone on monday i.e. 23 May 2016 but today also they told me that they need one more week to replace my earphone.
this was not expected from your side because while i m purchasing your phone you told us to give us the best service but now...