poor service

my rent was due on the 1st and it fell on the weekend i called the landlord to say it never go out cause of the weekend but monday moring it will clear he didnt tell me to call the c agent Monday afternoon the agent sends a mail that if i don't pay late fees ill be handed over n black listed i explained to her what happened and its the 1st time this happened for 1 day late she charged me R700 they called me from wats up call and charging me for that so unprofessional keep phoning and treating me if i don't pay the 1 day late fee they handing me over to be black listed they cant give a brake nothing