Our FR5 came with its fitted pendant cable, but the extra one on the spare-kit line did not arrive; the seller now wants to include it with another purchase, which would be easier if we were planning another purchase.
Ask them to dispatch the missing spare under the existing order. Quote the item identity and additional quantity. Keep the installed cable out of that shortage line.
Ask them for a written proposal against the original supply terms, including who bears the dispatch cost. Do not let it become a new accessory order by default.
Purchasing is asking them to fulfil the original spare-kit line, not accepting a new charge; I have passed over the messages so they can handle the commercial answer.
Maintenance has confirmed it against our package documents, Ravi; the seller has that identity in the request now, so we should at least be arguing about the same item.