Hero Motocorp — Engine coming different sound

Address:

B.Kanakaraju,Mokashakothavalasa village & post,S S Korukonda so,Jami mandal,vizianagaram dist Andhrapradesh, pin:535214

Sir, i B Laxmi i have purchased Hero Splendor Plus i3s model in varalaxmi motors pvt ltd vizianagaram, my vehicle number AP35AJ6011, last two months back i am going to servicing that time i'm telling engine coming different sound but the problem not rectify after that aging going to servicing they telling engine side spare not available still now my problem not rectify engine coming sound i am asking showroom person he is telling spare not coming so please solve my problem as early as possible.