Unable to pay bill online or by phone

I've been attempting to pay my bill online or by phone for several days. I received an error message that tells me, "Something went wrong." Although the credit card on file is valid and I have the funds to pay, it still shows that my card was declined. This is not the first time this has happened. The last email correspondence I received was on Monday, telling me to Pay Now. Clicking on that button just gives the same "something went wrong" message. I cleared my cache, and I still get the same message. Yesterday, I reached out to support, they connected me with billing, and I was immediately disconnected. I tried to call after work, but the AI support was extremely unhelpful. I see support tickets on my dashboard that show I called; however, they were closed, and the explanation given is 'misrouted calls'? 

I will say that logging onto the Comcast Business website has been an ongoing issue. It has always been glitchy for me. Attempting to make payments at times just leads to "errors" that the payment did not go through, and I usually have to try again.

I just need assistance so I don't experience any service interruptions. If someone can assist me in resolving this so I can make a payment, I would appreciate it.