Problem tenants

Dear Flat Chat
 
We have a pair of tenants in our our small block of nine units who
– regularly smoke on common property (inside and outside)
– allow their cat to roam around inside and outside at all hours of the day and night. As a result it wees on the carpet in the stairwell and sheds its hair and damages the garden. We then have to pay to get the carpet cleaned. Many residents are often disturbed at night by it crying and wanting to come in
– make abusive remarks to some of the owner occupiers if they dare ask them not to do things like smoke on common property
– plant plants in the garden without permission
and are generally very unpleasant to live with! Is there anything we can do to have them leave? Our Strata Manager is ineffective in dealing with our concerns.
 
Any advice would be much appreciated!

Sincerely

Fed up.