Beware: not existing service and *********** departments!

This text I have sent to Fidelity-ADT several times with reminders over the past 6 (!) weeks: "There are 3 accounts for the very same thing (KO....40 - KA....50 - KO....33), of which only the last one KO....33 has got the correct details of our company and VAT number on it. Unfortunately invoices are made out to the other numbers, can you please close the accounts KO....40 and KA....50 with immediate effect and use from now on KO....33 ONLY (as attached) and state that it is for service or whatever at property ..... in Constantia! Also please resend the invoice IR-MAY2019........-CT that s was in error made out to customer number KA....50 to the correct customer number KO....33 and send us also the tax-invoice for June 2019 to this correct customer number, as we never received the tax-invoice for June."

I really do not understand what is so difficult to get it right after sending above text several times. I have after weeks and endless reminders I now received amended invoices, but ALL still wrong and not as requested above. Must I come into your offices and sit next to the person in charge in order to get a correct invoice after several weeks trying by email??? This servicve is pathetic, if you do not even get your admin right, how do you want to help your clients in case of emergency?