Sony India — Replacement colour issue

Address:	600011
Website:	Sony India

I purchased a SONY Bluetooth SBH20 ( Black colour ) on April 2016, i have a fault on bluetooth and handsfree, am visit nungambakkam authorised service center for the issue on 18.8.16, he collect my bluetooth, he tells bluetooth will replaced in 7 working days, then he call me on 24.8.16 come collect your bluetooth, 25.8.16 am going to service center, he gives a SBH20 ( White colour), i asked for colour change he tells available stock only White colour, I like only black, so i searced lot of Sony center and buying on Mount Road sony center on April 2016, i want Black colour Bluetooth only, so please take a action as soon as possible...