payment method not imported and no info on defining custom fields for packing slips

We have a major issue with the shipstation woocommerce integration that may result in us cancelling the service before we even end our trial because we literally cannot use the service to conduct business in the workflow we have presently without the payment method being on the packing slip. We use a generated invoice as both our packing slip and our paper copy for data entry presently, since the shipstation service checks the orders off as we print postage and also generates a configurable packing slip it seemed like a natural fit to speed up our workflow by integrating the service that handles our orders with direct imports for shipping labels it seems like a natural fit. However, for whatever reason the payment method (which shipstation customer service has confirmed with screenshots they are receiving from the shipstation integration API) is not mappable to any data fields for the packing slip via html. I was told on that and other calls to resolve this that the way to do this would be either by sending the payment method via internal note, or by mapping it to a custom field. Then all support or explanation on what shipstation requires be done to do that ended, nobody I spoke to across four different support tickets seemed to be able to explain at all who needs to be contacted specifically to get adjustments made to the outgoing shipstation integration API. I was told once to contact woocommerce themselves since they are who the shipstation integration pulls from, but it is literally not possible as far as I can see to do so given that the woocommerce contact method is a form that will not submit unless it is regarding a purchased product and it is not taking the integration as a product. The form feeds me to a page saying to try again later, and that they only service premium plugins from woocommerce.

I find it hard to believe that we are the first company in over a decade to need the payment method on their packing slip, this has to have been resolved before.. Not having it on the packing slip would mean that every single order we input into our data entry service would have to have the order searched up and loaded in records, making the time savings from shipstation non-existent for us. Some clear direction on what specifically has to be done to get the cdata that is listed here in the cover photo attached given to me by the shipstation support member showing that shipstation is receiving the data into either the custom fields 2 box or applied as an internal note would be great. This has been a really frustrating first three days with the service, and if doing this is not possible then I will have to go with a competitor's service who can provide it. Seems wild to me that such a simple piece of data that I see on packing slips in orders I receive all the time isn't in the shipstation packing slip by default, but the inability of anyone to tell me specifically how to get that information into the custom fields or internal notes boxes (which the suport staff have told me are there specifically for that reason) to use them has compounded the frustration.