Sony Service Centre Kannur, Kerala — Sony xperia z ultra

Address:

Kannur, Kerala, 670006

My sony xperia z ultra phone some times charging some times not charging. Iam going to sony service centre kannur(shakkeela complex, kannur, caltex, kerala, india), they saw my phone, he tell me 1 min wait then he went to service room, after 5 min he come and speak to me your phone charging pin is not good bt hear old phone pin not repairing. Hear warrenty phone only repairing.Last he talk to me 1 option is hear: exchang offer is hear old phone 33% discout is hear, u want this offer, , , tell me sir what can i do, , , sony product is very good excellent but sony kannur service centre is not good, sir take action