1. Firstly you must know that the person occupying the premises must obtain license for running commercial premises;
2. Also ask if police verification process has been completed or not?
3. Then if the building is as for residential purposes and used for commercial activities then you can file a formal complaint to the municipal authorities;
4. You can also file an NC if not FIR for breach of peace being caused;
5. This can be both civil and criminal matter, so consult a local lawyer and take steps.