This business has the WORST customer service I hav...

This business has the WORST customer service I have ever encountered. Every time I attempt to contact them, I am on hold for a minimum of 30 minutes, usually closer to an hour. Yet, if my payment is even ONE day late they call me, literally, 4 times per day, EVEN WHEN I have already made the payment. Today, after the 3rd call, I asked to speak to a supervisor. I was refused. Instead the agent put me on hold for 5 minutes and returned to say that he would "pass the note on" that my payment had already been made. Absolutely ridiculous business practices!