SageDontPay
They're history for our shopping cart - the moment I can switch providers, bye bye SagePay. Others may have, but I never had a problem with the old Protx company, but I did expect problems once they were bought by out Sage, I just didn't realise how many there would be. My inbox pings at least once a week with a message from them telling me about some failure in their systems and the cause has been identified and fixed. Yeah right, until next week.
Biting the hand that feeds IT
