Hello,
Since you have already got the scaling done, I suggest you check for acidity. In case u have acid reflux, it can also be the reason for bad breath. But first and foremost is having lot of water throughout the day. Dry mouth is a big reason for bad breath.
Next Steps
brush twice a day esp before bed time. scaling and deep cleaning of teeth if required can be rechecked.
Health Tips
stay away from high onions and garlic based food as they tend to give bad odour as such.
I'm sure you will find a good dentist in Bangalore who can personally help you.
Best wishes.