item paid no funds

Fnb is keeping on charging me item paid no funds.l dont have any item which i paid with my card.l cant keep on complaining about the same issue each and every month can you pleasle stop this i asked to close the account each and every month you are charging me for items paid no funds which items are you paying im getting tired of this.FnB is disgusting you cant be doing that i cant be writting complains every time.lm closing this cheque account