Sony India — Edge rubber lost

Address:

Kota, Rajasthan

I purchased sony xperia m4 aqua on 13 july 2015 on 25 july sudnly I saw that my xperia was in my pocket but the side edge is not there please help me i visited the sony service center kota rajasthan but the said the whole display will changed and it will charge you, , . Jst wtf why they are charging me for jst h piece of rubber they r saying tht whole scrren will be change and it will comebin out of waranty plzzz why should i pay for that which i havnt broke plz help.me i m.getting frustated of this sony service My contact number [protected] Email atir.[protected]@gmail.com