Apologies for the delay in replying. The money was taken from my Debit Card. I believe they are based in Denmark
You need to write and set out your losses and request a refund within 14 days or say you will go to Court within 14 days. You should make sure you send this recorded delivery and keep a copy.
Even though this is international you can send it international recorded
If they do not refund you then you can issue proceedings in the County Court. You can either by completing form N1 http://hmctsformfinder.justice.gov.uk/courtfinder/forms/n001-eng.pdf and take it to your local County Court.
You also need to complete form N510 as this is service outside the UK
The Court will then issue a claim which a copy will be sent to the Defendant who will have a limited time to defend it, if not you can enter Judgment and enforce.
Even though they are in Denmark you can get a European Enforcement Order
If the matter is defended it will be set down for a trial. If the claim is for £10,000 or less it will be a small claim and you will not need representation.
Can I clarify anything for you about this today please?