Residential property use as a commercial

Dear Respected Sir

My tenenat renting a room and not living there but using it as a commercial warehouse for his carpet business in a slum area where family live in neighbourhood.  I have given him a laywers legal notice and it went by unheard without even looking at it it went into gargbage can.

My question : what is the court time to battle this kind of case and how much funds required to get rid of him legally.

Thanks Best Regards

Please keep the good work

SPatel