Adobe just canceled my year subscription plan due to fraudulent activity (which is wrong)

On Oct29, I've purchased subscription plan for my account (which I've been using for 3 years until now).

I paid full price for whole year (US$599,88) with my own credit card. I located in Vietnam and my credit card is from Vietnam. My billing address also from Vietnam. I did not use any VPN or fake IP method.

On Nov20 I received an email from Adobe noted that my account is linked to fraudulent activity and they removed my subscription plan, without any further information.

I contacted Adobe support right after that but they refused to explain why my account is dectected as fraudulent and ask me to wait for 3-4 days to further investigation. But after 4 days they just sent an email to notice that my case is still linked to fraudulent activity and close the case, no further information either.

My account is valid, my credit card is valid. I purchased the plan by myself on https://creativecloud.adobe.com/ . How comes it can be detected as fraudulent activity. If this happen and cann't be resolved I would not trust Adobe anymore since they took my money and remove the service (not refund, just removed) only after 1 month without proper explaination!

Does anyone has the same experience as me? Could anyone support me in this case? I feel really frustrate since Adobe's support feel very unresponsiveness and unreasonable!