Try DIY way and you can do in less cost.. I believe lot of articles were written over here. Venkatcr is with decibel now so he will tell the cost of quote given by professionals.
Just go thru the link and you will find a nice way to do yourselves..
Practical Domestic Room Acoustics
Or simple way is to hire Santhosh on our forum and sponsor his travel cost to chennai in an weekend and he will do it free of cost. He has some work to do it chennai and he will be happy to fly on your cost to chennai for this job.