Sony India — Sony z5 incoming calls can't attend

Address:	Kollam, Kerala, 691589
Website:	sony

Dear sir
I have purchased sony xperia z5 8 months backfrom starting i have lot of issues with call attending time phone hanging, battery backup problem. After several visits to sony service centre problem not resolved. At last 24th october 2016, job number is w[protected] at
Madona, kollam kerala (Sony authorised service centre). At last they told me that the battery is replaced and the hanging problem is rectified. They kept my phone for aronund 20 days for repairing. That means they took more time for repairing of 12 month warranty peroid phone. But i get back the handset from service centre after repairing the complaint still persist. What can i do your customer support is very bad. I cant attend incoming calls. Please resolve my problem as soon as possible