Problem:

I do not have a credit card but I do have a debit card, how do I pay for the subscription?

Solution: 

At the moment, we only accept payment via credit card or PayPal at the time of purchase for individual users.

However, certain Visa/Master debit cards are still accepted because Visa/Master debit cards rely on their credit card network to process online, phone, and international transactions. Debit cards alone cannot support the online purchase, which generates a declined transaction.

The debit card's compatibility will depend on the bank's networks, so you might need to contact your bank to understand why your Visa debit card is declined.