INCOMPETANCE/NO CUSTOMER SERVICE

i made a vehicle payment on an arrears account. I have been waiting for more than a week for and updated statement. I have sent request after requested and they just don't seem to process my payment to the account nor send me and updates statement to reflect my recent payments. in the mean time i am being charged for non payment and more interest on account that is UP TO DATE. incompetence at its best. how long do i have to ait for a correct updated statement.????? when payment is made customer are **** but when no payment is made all hell breaks loose. Pathetic!