endless frustration and shocking service from discovery health

discovery has short-paid a whole month of therapies that they always pay in full and they told me to get the invoices adjusted by the provider they have don't this but still didn't pay plus the invoices are precisely the same as they always are there is absolutely no reason not to pay them we are above threshold I have spent hours on the phone with discovery and been told that it is sorted and will be paid yet now they say there's a problem again so frustrating