Can i end/terminate a commercial in a residential property?

[Alexander Stefanini]

Hello.  This is the situation.  I purchased a duplex thinking that one of the units was empty bc it appeared mostly empty except a few desks.  I now find out that this residentially zoned duplex has a business/commercial lease for a business in the 2nd unit.  I want to terminate their lease due to a variety of factors including, 1. they are unworkable and jerks, 2. their lease is for way under market value (rent).  I believe (but don't have concrete proof) that them having a commercial lease and running a business in a residential property is reason for me to terminate their lease.  Anyone have advise on this or can point me in the right direction of who to call in my city.  The house is in philadelphia, PA.