Royal Enfield — Classic 350 Reborn making engine sound after my first free service

Address:

Lanka

Hello, Iam Ranghon Teron from Karbi Anglong, Assam.I recently got a Classic 350, Reborn from Royal Enfield, Lanka.
I've just done my first free servicing from Royal Enfield, Lanka itself and now there's weird sound coming from the engine which was not there before the first service.Its a new bike and Iam not at all happy about the services that Royal Enfield, Lanka has provided.
Now, what do I do??
Please send a professional at my address to solve this problem because I cant spend my petrol just to go there and fix the problems which they have created.
I experienced a very poor service.
Please look into this matter seriously.
Thank you,
Ranghon Teron
Assam