Yamaha Motor India — Engine sound problem

Address:	Ongole city bhathulavari gunta Prakasam dist 523001
Website:	www.Yamaha motorcycle.com

Actually few months back I bought a yamaha mt 15 but last time i gaven a service and after then I paid service charge and taken my bike but After 3months my bike suddenly engine problem it's like that engine sound immediately I'm going in ur service check it engine it's a engine problem (rs25 thousand s) he will saying I'm asking engine service and warranty ...
Soo plzz consider my problem I request u sir plz conclusion