Payment Error

Hello, I wanted to switch my Adobe Creative Cloud student package from monthly pricing to annual pricing. I talked to the customer representative, he canceled my monthly plan and asked me to purchase an annual plan. When I tried to purchase an annual plan, I encountered a purchasing problem. 6 different credit cards, 3 different devices, 4 different price quotes, 3 different customer representatives, none of them worked. I've been dealing with this for a day, but I still can't make a purchase for the student plan. I wanted to switch to the monthly plan again, but it was not purchased either. There is no problem with my credit cards either. I even tried to open another adobe account but it didn't work. I need to switch to the annual plan as soon as possible and continue using the applications. what should I do? Is there a problem with the Adobe purchasing system? The error I get is: The operation may fail for various reasons. Double-check your payment information and make sure you entered it correctly. If this problem persists, you may need to use a different payment method or contact your bank.