Not doung their job

People not doing their job. Sent proof pf payment to Nelly Xulu,Cecilia Maphulamlo and NKoli Mzayiwa and still they are sending emails bugging me . Payment was made 3/2/2023 eventhough arangement is for 7th yet they say last payment recieved 6/1/23 how many times and to how many other people should i send proof of payment before you do your job😡