Poor service and messed up account

Have always been a loyal payflex client for many years, after a recent issue I dont think I will support them anymore, my available balance always used to refresh as payment are made and become available again, suddenly after my last purchase thats not the case, spoke to support and now is suddenly R0 available ? I have much higher limit than what is owed and cant use it now but they say the system updates it... this is not acceptable Payflex you messed up my account!!!