Maintenance incharge- of flat - issue rental

sir, we own a 2bhk flt in chennai..and i live abroad. it is a building with 10 units in it.we have the maintenance incharge always complain about our tenant with some silly reasons as she does NOT like bachelor tenants..she already made us vacate our previous tenant..and she s trying to do the same with our current tenant. but i told here clearly this time that any complaint or concerns about my tenant going forward should be in writing and we will do the enquiry through police..if its end up false, then i  told her that  she will he held responsible for all rental income loss through civil suit. is this a right way to approach and make her mouth shut...she even goes and brags with the other residents inn the building that she only made the previous tenant of ours vacate,...