I honestly don’t have a problem getting them to sort things out. Sometimes it can take two or three days while they get the right departments involved. I would think you got the same label twice because whoever responded to your original email misunderstood and thought you had a problem with accessing it or something, or maybe they thought they had re-activated it for you and it would work now; you probably got a different label in between because the response to your first email came after you’d called again in the meantime, and the girl you spoke to was trying to hurry it along for you. Different people acted independently on your two separate approaches. This is why I suggest email and phone call to explicitly link the case together, so things don’t get out of sync. Bullet-point the email so they can’t miss a thing.
The girl on the phone is right that all she can do is give you a new label, she’s only customer service and all she can do further is offer to pass the problem on to the right department/s, it’s the same anywhere really, isn’t it? There’s clearly a technical problem in the setup between VC and FedEx which might be the fault of either of them, or possibly a problem with the way your address has got registered for this pick-up at FedEx; the customer service girl is just first port of call and she’s doing what she can and has offered to escalate it appropriately. Two different people have tried to solve it by reissuing the original label and issuing a new one. Only someone who is in the right department or has the technical knowledge to liaise between departments will be able to deal with it and it might well take a few days because it probably involves both IT and logistics. I really do suggest the synchronised dual attack method to kickstart this again with everything coordinated.
Are these shoes going direct to your buyer or via France or via New York? Some shipping labels we receive in the UK now require us to drop off at a post office instead of getting DHL collection; I guess you’re certain this is a collection label? Obviously FedEx should tell you if it isn’t and not arrange collections, but I’ve often had issues with telephone agents at couriers making mistakes of that type. I still don’t understand why FedEx is telling you they’ve booked a pick-up and then they don’t come. Surely they validate the label at the point of booking?
I have to say, I really do feel for you and for your buyer, but my goodness, if I were her and ordering something essential for my wedding I wouldn’t be ordering so close to the date on a resale site, that’s so risky for something you want for a specific time because even if everything goes smoothly it can take time. They might not pass QC, or might not fit. Fingers crossed for her and you it all gets sorted out.
You won’t lose your badge if you explicitly ask them to ensure this glitch which is outside your control does not make that happen. Alternatively you can take it into your own hands and cancel the sale if it’s within 5 days, which will keep you your badge, as it specifies in the FAQs, but I guess it’s been more than 5 days now? If you are in time and did want to cancel for the badge reason, you could re-list the shoes immediately (letting the buyer know first before you do all this) so she can buy them again as soon as they appear and you never know, the label might work out next time. No good to you if it’s past 5 days, I know.