Yamaha Motor India — Bike issue - R15v4

My chain got automatically removed while driving. It’s a new bike and I just had 4th service from service center.
The bike got removed and I dragged it home and called RSA person to fix it but post fixing the bike never moved and was toed to service center.
They told that the crank is broken with some bearings and since 1st April my bike is in service center. Nothing has been done as service center says that we don’t have parts and they are back ordering it since it and talk to company. Already escalated to yamaha multiple times but still no success.