Very unsatisfied

Good day, i keep on receiving invoices that my bill is not been paid, this is not the first or second time, but the 4th time. until today i did not missed one payment, please explain to me what should i do more, because the people who is dealing with the accounts , don't know how to update the statement. i have requested statements, and nothing is been send to me or updated statement, please update my payments and get back to me. Please phone me or get this sorted!!!!