PAYFLEX FAILING OF INSTALMENTS WHEN BUYING

IS ABOUT A WEEK TRYING TO SOLVE THIS PROBLEM WITH PAYFLEX NOT LISTENING WHEN I SAID I WANT TO ORDER WHEN I AM ON CASH OUT IT DOESN'T APPEARING PAYFLEX SO IT CAN BE THE ONE TO ASSISTED ME WITH PAYMENTS OF THREE STALMENTS. UNFORTUNATELY PAYFLEX DIDN'T HELP ME WITH PAYMENT SAYING AS I SELECTED FOR INSTALMENTS OF SIX MONTHS, WHEN ALREADY PAYING WITH CARD ALL R74O. 00 AND SOMETHING PAYED IN CASH. I MUST MAKE CUSTOMERS AWARE THAT PAYFLEX DIDN'T RUNNING THINGS IN ORDER, THEY ARE FAILING. AS I BUDGETING FOR INSTALMENTS NOW IT MAKES MY THINGS TOUGHER AS THEY RUNNING PAYFLEX AS ****A SHOP😡😡😡😡 MR JOHANNES