Refusal to pay a claim

Discovery is refusing to pay a claim arguing that the hospital invoice is not clear where the services were done. The hospital invoice at the bottom clearly states that the “services ware rendered at the hospital.”

Discovery’s reason for refusal is that each line item of the invoice should state that the service was at that hospital- how stupid is such an excuse ? The bottom of the invoice captures everything by stating that the services were rendered at X hospital.

It’s been almost three months and discovery keeps coming up with excuses for not paying - with the latest excuse being the most hilarious one and they expect me to go back to the hospital and ask them to reissue the invoice stating that each line item was done there. This is crazy, the person had surgery, how could that person be injected with an anaesthetic and then go to another place for the procedure 🤷🏽. In any case the invoice does state at the bottom that the service was done at their hospital