MIOT Hospitals — I am complaining about the reception counter

I want invoice for the payment in miot for covid review .I asked to the receptionist for the invoice, they said to wait for the cashier to come and give you the invoice, because he has full access on it.I wanted invoice very urgent but I waited from 3 to 4 o clock afternoon .There is no response in this hospital, I want to take immediate action in the covid block reception for this contempt action