Kent RO — New Membrane busted after 108 days of installation

Address:	Gautam Buddh Nagar, Uttar Pradesh, 201301
Website:	www.kentro.co.in

My machine was serviced on 25/02/2016 with required spares to be changed. Membrane and frt which was costing around rs. 2750/- (Bill enclosed) has warranty period of 3 months (Around 91 days).
On 12/06/2016 heavy leakage started from machine. A complaint was lodged regarding leakage. While service engineer on complaint, came to check the issue, found that membrane and frt was busted and causing leakage in machine. He told to change them with new ones on chargeable basis (Latest bill enclosed).
My question is that how those costly items which were warranted by kent ro for 3 months, got busted just after passing 3 months.
This is a quality issue of spares because of that i have paid rs. 2750/- in my crisis time.