Karbonn — price excession

actually and basically i brought up a cellphone of brand karbonn, model:-k350 a a cost of Rs2899.but after my doubted enquiry i came to know that the present market price of the cellphone is about Rs2200.
On that respect i want total justice claiming to my purchasal and my valued transaction...thereby i remain

Vendors name:-M/S MAHALAXMI ELECTRONICS
LAKHIPUR, , DIST(CACHAR)ASSAM