LAVA IS NOT SOLVE THE IRIS X5 NETWORK PROBLM OR NOT REFUND THE PAYMENT

DEAR SIR,
I BUY LAVA IRIS X5 ON 23 OCT 2014 . NEXT DEY I FACE WEAK NETWORK PROBLM IN HANDSET. I CONTACT THE SERVICE CENTRE . THEY RESET THE PHONE AND HANDOVER ME. NEXT DAY I FACED SAME PROBLEM. I AGAIN CONTACT SERVICE CENTRE. THEY UPDATE THE SOFTWARE AND HANDOVER THE FONE. BUT THE PROBLEM CANT B E SOLVED. NEXT TIME I CONTACT THE SERVICE CENTRE AND THEY DEPOSITE THE PHONE. AFTER 15 VDAYS RETURN THE PHONE BUT THE PROBLEM NOT SOLVED.
I M VERY TIRED FOR LAST 4 MONTHS. BUT NO CAN HEAR ME.. SO AT LAST I COMPLIN HERE. PLESASE SOLVE MY PROBLEM. I HAVE LOST MUCH MONEY AND TIME AFTER 15 ROUNDS OF SERVICE CENTRE . SERVICE CENTRE DISTANCE DISTANCE 45 KM AHEAD FROM MY HOME.

THANK U