Updating my billing information doesn't go through

So, back in December 2017 when I started working, my boss was nice and got me Illustrator, since I requested it to get my job done. I'm basically in charge of the account, because I'm the only one using the product, he just pays for it.

Last autumn, the card that was used to pay for it was removed from the company use, and at the end of the year, Adobe started sending me emails, saying they couldn't renew the yearly subscription to Illustrator because of a billing error. I went and updated the billing information on the account to a new card.

Adobe kept sending these emails, and at one point, I wasn't able to use Illustrator anymore. If I go to check the billing information on my account, it shows the information of the new card on it, obviously, since I had updated the information.

I contacted through the help chat to Adobe and they got me a new subscription to Illustrator, and I thought everything was fine. But opening the Illustrator, the "billing error" message popped up anyway. Contacted again, they asked for the last 4 digits of the (new) card, and informed me that things should be alright in a few hours, and I considered the case solved.

I was wrong. Still, every time opening Illustrator, I get the message. I go to my account and the billing information shows correct to me, and even if I write it all again and save it and it shows the green text telling the update has been successful, I still get the pop up when I open Illustrator.

Today, I get an email from Adobe, saying they can't charge me, for a card that ends in 'xxxx' digits, and those were the old card's digits! So apparently me updating the billing information, and even contacting them, didn't actually solve anything, because the information on their end is till outdated.

Even though the pop up window that I get when I open Illustrator, says that I can 'use Illustrator until December of this year', I am afraid the emails keep coming, and eventually they will just cut my rights to Illustrator once again.

I don't work full-time, and since it is my boss's card, I don't have access to it whenever. So solving this problem is not so easy on my side either. Also my boss does not have the time, language or understanding to solve these kind of problems. I don't feel like making a new Adobe account for the company, just to get a new subscription and correct billing information for using Illustrator, I mean that's just stupid and a hassle. This shouldn't be this hard a problem to solve!