Pathetic service from Admin and accounts department

I called RCS Accounts / Admin dpt requesting for a settlement letter every day since last week Tuesday up to date. I really do not know what else to do at this point! I Just want to settle my account but i need the letter but I get the same story every day since last week saying:

"YOU WILL GET THE LETTER AT THE END OF BUSINESS DAY"

Pathetic Pathetic Pathetic is the only words i can use to describe them!!!!!!!!!!!!!!!!!!!!!!