What happened to you is that your goods were not sent DDP (Delivery Duty Paid).
The good answer!
And this is what B&O should do... it's incredible they have not answered yet and that they do not provide phone support.
This tells you a lot on how B&O treat their online customers. Truly not professional.
If you are planning to set up an online selling business, you have to make good agreements with UPS, DHL or any.
I ordered years ago a product from Argentina transported with DHL all included, Belgian customs wanted me to pay almost double on import taxes and handling. Luckily my wife is a private Customs agent and she has the capabilities to negotiate with all those agencies.
At the end it was DHL's fault not to provide the correct papers, so Belgian customs had to charge. You never get a refund from customs and DHL payed me back with their tail between the legs. But I can asure you, it did take some professional effort to get the money back.