Xfinity chat lies

I setup a payment arraignment for the end of March to pay my past due so my services would not be shut off I woke up this morning and my services were shut off. I spoke with 4 different people today and was told oh well nothing we can do after your two employees yesterday told me after looking through my account I was eligible to setup the payment arraignment and that my services would not be shutoff and that was confirmed by yet another representative an hour later from xfinity saying the same thing as long as I had the arraignment setup and paid it by the 31st of March my services would not be shutoff and that off. So now I have to come up with 600 dollars to pay my past due . So I guess xfinity can lie to its customers and get away with it.