We would always advise that in the event of a complaint the first contact is made with the trader by you - preferably in the form a letter (with proof of delivery). If that has not worked, if you are located in the UK, Citizens Advice service will give you advice. From outside the UK contact the UK European Consumer Centre.
Licence holders may at any time apply to the authority for a variation of the terms, conditions or restrictions in their licence.
If an application for a variation is refused, or if the licence is revoked, the licence holder may, within 21 days of being notified of the imposition of, or the refusal to vary, the term, condition or restriction in question, or of the revocation, appeal to the local magistrates' court.
A licence holder may also appeal to the crown court against a decision at a magistrates' court.