Sony India — Sony Xperia C4 Dual

Address:

Ahmedabad, Gujarat, 380061

I am literally fedup with Sony Xperia C4 dual model. Since my purchase of this mobile last 8 months, I have given 3 times for service center. I have given Rs. 2500/- extra for white color and now this service center offering me black color in same model. I can accept higher model but not black color in this same model. Pls help it has been 25 days since I have given mobile to service center.
Work order no. W[protected]
Pl pl pl please help me.