Yesterday (27/10/22) I received a letter dated 17/10/22 threatening me with legal action if I did not pay. I have sent four emails and called them multiple times with no response, but finally this morning I received an email (10 working days after the first; ie within the time period promised by them) saying;
"Having reviewed the above mentioned invoice(s), we can now confirm that a credit of 29.95 CHF has been raised.
FedEx trust this concludes the matter, however should you have any further queries please do not hesitate to contact us."
I haven't paid but I guess the "credit" is for their internal accounting purposes.
Take home points for me;
1. Photograph import paperwork when it arrives - in particular note the waybill number in case need to complete the online form mentioned by Xonic as it won't send without
2. Don't blame everything on Brexit (I jumped to that conclusion early on having not had a problem with this type of import before)
3. Keep cool and post here if problems arise!
Thanks again