Big Issue with Billing

For a reason I can't determine, Adobe is rejecting my payment from my credit card. I know this is not my card's problem because I entered the number correctly, it is working just fine in every other transaction I make, I'm not over my balance, etc. But Adobe won't accept it and wont explain why.

Naturally, I called customer support and they were completely useless. The representative tried to transfer me to the "individual account" billing support team, even giving me their phone number in case we got disconnected. I was almost instantly disconnected, and when I tried to call that number, the line didn't work. i.e. the classic "Your call cannot be completed as dialed." Multiple times.

So I called the original number back and this time, when the rep transferred me, I waited in silence for about five minutes before I was disconnected again. 

I would really appreciated my account not being deactivated for an issue that I cannot control. I'm pretty irritated, but grateful for any advice anyone has for dealing with these types of issues. Thanks in advance, all!