National Home Services No Longer In Business

I paid National Home Service December bill on Dec.19, 2014 for water heater rental, but I still received January bill on Jan.18 saying December bill not paid. Called many times, phone waiting time is very long, usually 20-30 minutes, but sometimes over 60 minutes. For a long time, they never called back to fix the bill error. I plan to keep calling in the next few weeks to correct the billing error. What a waste of time!