UK: How to complain about a business
I´ve got a question for a UK citizen. I bought an item through Amazon Germany without being aware that the seller was a british company. Naturally, they charged VAT.
Even though I can provide an UST-ID (as I own a business) the company won´t issue a new (net) invoice nor return the VAT.
Where can I complain about this company? Directly at the tax authorities (who would these be?) ?