Arizona Public Service [APS] review: won't accept credit card payment - threatening to turn off power

I'm taking care of my mother from out of state. My mother is now on home hospice. I tried to setup a auto-pay for APS electric but their website had fouled up the process. Now, they will not accept payment via credit card or check. They will only take cash. She CANNOT leave her bed. Basically, because of their faux pau, are threatening to turnoff her power. She cannot get to a location to pay the bill via cash. Impossible. She is literally on her death bed. Her credit and mine are exceptional but they will not listen or accept the money. What can I do? All I want to do is pay the bill.

So far, I've filed a complaint with the Better Business Bureau of Arizona, Arizona Corporation Commission, Arizona State Senator Judy Burges, Arizona House Representative David Livingston.

Please contact me so that I can resolve this issue. It should not be an issue. Our credit is great and we are more than will to pay.