Can commercial activity in residential building on commercial street be stopped?

I live in 1 flat out of the 8 flats in our residential building situated on commercial street. Some owners have converted there flats into commercial offices. Upon enquiry through various RTIs we’ve found that these people have not taken any permission to run these offices. We’ve taken advice from some MCD officers and lawyers and have been informed by them that in such cases also, the already running offices will not be sealed or stopped by the court and only penalty shall be imposed. Is there really nothing that could be done regarding these offices, as even no one is willing to buy the house due to these commercial activities, so it feels like the residents are stuck with their flats due to these illegal activities. We are also scared that if we do not cooperate with these people they might try to hurt us or create problems for us as none of use has completion or occupancy certificate for our units and as it was built in the 1990s, we don’t know if it is legal or not. Please help!