Visa recently announced additional fees for merchants if you process the same payment request more than 14 times in a month after the first one fails. This could result is large additional fees to our users as our system was designed to retry failed payments every day.
To address this we have changed the default behaviour when a payment fails. Now, we will try every day for 7 days, and then retry ever three days thereafter.
We do give you the option of retrying every other day and every day, but you may be subject to other charges (not by us mind you). You can change the default behaviour in your payment gateway settings page.