Hi Kexter, sorry to hear that there are some problems making that payment for Total Upkeep.
We currently only accept credit cards as a payment option at this time and we apologize for any inconvenience this causes you.
Our team just tested the Checkout form and things seem to working normally, maybe this was just a temporary error. If your payment attempt fails again then the problem could be related to browser caching and clearing your browsing cache or loading up the Checkout page in a Private/Incognito window might get things working.
Please let us know if there is anything else that we can do to help!