Hello, I am managing only one property in Oklahoma County, Oklahoma for a friend of the family and today one of the tenants told me over the phone the lease is not valid because I am not a real estate professional. (1) Is this tenant's statement invalid and (2) can I have the tenants evicted for (3) a hostile tone directed at me over the phone regarding sewer repair and/or (4) evicted for making such the verbal statement that the lease is not valid. Thanks.