Why did the Google One purchase fail?

Google One is a paid subscription service by Google that enhances your cloud experience by offering expanded storage, advanced features, and exclusive benefits.
For your reference, here are some reasons for purchase failure:
1. The purchase have failed because your payment method was declined, expired, or had insufficient funds. It’s important to check that your billing information is accurate and up to date;
2. A mismatch between your Google account’s registered region and your payment method’s country can also cause the transaction to be rejected, especially if you recently moved or are using a VPN;
3. Technical issues such as outdated versions of the Google One APP or Play Store, or corrupted cache data, can interrupt the purchase process unexpectedly;
4. If your device has a poor or unstable network connection, it can also lead to purchase failure. Make sure you are connected to a stable network when attempting the purchase.