Is Apple's Self-Repair Program Real?

Has anyone successfully used Apple's Self Service Repair Store recently? I've tried ordering a battery replacement kit and toolkit for an iPhone 13 mini this week. Despite multiple attempts using different credit cards (Visa and Amex), browsers (Chrome, Firefox, Safari), and accounts (mine and my spouse's), each transaction was declined due to an "information mismatch" at the bank's end.

I confirmed with both banks that all entered information is correct, and they have no issues processing the transaction if submitted properly. They even ran test transactions using the exact information I provided, confirming that they would approve the transaction if submitted correctly. This suggests the issue lies with the repair store's payment processing.

Has anyone else faced similar issues? Is this program still functional for consumers? I reached out to their support and was told that I can pay for just the battery via PayPal, but I am not able to rent a toolkit via PayPal. And they refused to help me any further.

Is it me or them?