Company X is registered in Hyderabad and has a branch in Bangalore - Legality of a company branch in Karnataka?

This company X is registered in Hyderabad and has a branch in Bangalore. However the company has not been registered in Karnataka. Even the PF of employees is in Hyderabad. The organization is in the ITES sector.
1) Is it legal to operate in Karnataka in this manner?
2) If I have to report this who would that be?

If the company has Registered office in Hyderabad & if at all there are any branch offices in Bangalore the following registrations in Bangalore is mandatory
1) Registration with Shops & Commercial Establishment
2) Registration of Professional Tax (Both EC & RC)
3) Trade Licence Certificate
4) Sales Tax if applicable
PF can be contributed in Parent company & there is no harm

Now in Karnataka to my knowledge ITES companies are exempted from any compliance under Shops and Establishment Act. But they have to apply for P Tax. Also there is service tax and sales tax. So if you are sure that they are carrying any illegal activity or carrying any activity illegally. First contact area Police Station and lodge a GD. Then they will take care of rest. No other department can directly take cognizance of your complaint as you lack locus standi.