Hi Debbie,
I am sorry you have been left without essential equipment after following Microsoft’s instructions. “Advocate” simply means the support representative assigned to the case; this forum cannot access or escalate service orders internally.
Please contact Surface Support and request a supervisor escalation for “received equipment with repeatedly cancelled repair orders.” Provide both case numbers, the UPS delivery confirmation, serial numbers and a complete list of everything returned. Ask for written confirmation that the service centre has located each item, and do not agree to close either case until replacement tracking is issued.
If this is a Surface for Business purchase, your organisation should instead use the Surface Support Portal. For your trip, a compatible USB-C Power Delivery charger may temporarily charge the Surface, but do not reuse the damaged cable.
Thank you, and feel free to respond back for more assistance.