Please contact us at sales.team@lowerdomainrates.com, I will read and respond to your email within 12 hours.  You can also call our office at 508-678-6269 and if no answer, please leave a voice mail, or go to http://pathiggins.shopco.com/tech_contact

If you are having trouble with renewing or purchasing  a domain name with a "stored" credit card, then delete the stored credit card and add it back.  This seems to resolve this issue. 

Patrick