My Tenants Said I Should Give Them 3 Months Free House Rents.

Hi everyone I sold my 2 plots of lands this past year to build a house. So the problem now is  that my 4 tenants rent have expired since last month. My junior brother informed them there house rent have expired they told him that I must provide them with 3 free months. That’s what nigeria law said unless I should give them quit notice .It’s very sad that a house I built with my hard earn money somebody is likely to be telling me he will reside in my house for free. I do want to know which step I need to take