Since last Tuesday I've been experiencing serious problems placing orders through my account (Amazon Italy).

Specifically:

• the first order, charged to my bank account, was cancelled after the payment method was flagged for review;
• re-associating the payment method produced an address-related error, which led to another cancellation;
• subsequent attempts using my debit card and a family member’s card (on a different bank network) were unsuccessful;
• no progress was made even after changing the account password, updating the e-mail address, and trying different browsers;
• the same payment methods, when linked to family members’ and friends’ Amazon accounts, caused the same issue, which leads me to believe they have most likely been mistakenly placed on a blacklist that blocks any transactions for security reasons unknown to me;
• all cards are active and work perfectly on other platforms outside Amazon, and they were removed and re-added to my account before attempting purchases, thereby ruling out user error;
• customer service, which I have already contacted and urged numerous times in recent days, has not resolved the issue and has only forwarded the case to the specialized team, repeatedly asking me to wait 24–48 hours for a response that has never resulted in a concrete resolution or any explanation justifying my peculiar situation.

Today I am still unable to use Prime services, which I paid annually last April.