Poor customer support

So frustrated with the poor customer service I am getting from payflex customer support. Their system won’t let me make a payment manually using EFT or bank card option. I have tried to change banks and bank card on the App and still getting same error. I contacted my bank to see if the debit orders have been blocked but they confirmed that there is no flags on their side. I had 3 orders with payflex and I could manually pay the other 2 orders but the one order keeps being rejected so clearly the issue is not my bank. I have been logging the issue on the customer support service but I get quick response that doesn’t help. They keep telling me to use the EFT or bank card option which I already stated that they do not work. The arrears keeps increasing non stop and this is frustrating.