I was charged and extra charge from a hospital. The full hospital fee was paid in full prior to leaving. The extra charge was charged back on our end since the full medical fee was paid, but the hospital disputed the chargeback
The hospital provided the receipt as "proof". This receipt was a transaction we had to sign just to get the patient into the hospital and should have been canceled.We provided the bank with the documentation indicating the full medical bill (the same documents provided to the bank by the hospital to justify their claim) and the full payment of the medical bill.
The bank is indicating that the evidence is not enough to make a claim. To make it worse, the hospital is attempting to justify the change using a invoice of a completely different patient.
What can I do?