<prompt> Human: I got work done in January. When I went to pay, their system was down, so they said theyd send me a bill. I never got one. I called them and went in totalk to them, each time, they told me I had paid and dont owe anything. I do not remember ever paying them and theres nothing in my CC statement. The problem is, my deadline to submit expenses to my HSA is two days from now. Its money I had set aside for this work, and I lose it if I dont claim it by the end of the month. If they dont want money, honestly I could care less, but I dont want to be screwed when they figure out their error after the 30th and I have to pay out of pocket after losing the money I had set aside. What do I do? Ive tried calling today and their system is down. What can I do to protect myself if they refuse to take my money?  <response>: Get it in writing from them you dont owe anything. 