@adityabhatt here on iFixit we try to empower you to fix your own devices. In general we can't make specific recommendations for any repairer unless they are well known to the community. Those referrals are never very objective since everybody has different experiences.
Most common issue is that the hinge mounts breaks. Most of the time it's the top case mounts. We would need to see more of what is broken. Open it as much as you can and take lots of pictures of the damaged parts etc. Post those with your QUESTION. That way we can see what you see.
You can use the guides on here [[Topic:Asus Q551L Repair]] or use something like [https://www.youtube.com/watch?v=-ukwS05ejEs|this video] (slightly different model but same idea) to work on it. Once you have narrowed it down to what exactly needs to be repaired, you can try an online search for the hinges and Top cover etc. as needed. Don't buy parts ahead of time since you may not need them or may need other parts as well.
[guide|21499]