I can tell you how to do it.
You need to write and set out your losses and request compensation within 14 days or say you will go to Court within 14 days. You should make sure you send this signed delivery and keep a copy.
If they do not compnsate you then you can issue proceedings in the County Court. You can either do this online at: www.moneyclaim.gov.uk or by completing form N1 http://s3-eu-west-1.amazonaws.com/hmctsformfinder/n1-eng.pdf and take it to your local County Court.
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.
If the claim is for £10,000 or less it will be a small claim so you will not need legal representation. Over this value, you would need representation for trial.
If it is more than £10,000 you want to claim then you can get a public access Barrister to draft pleadings and represent you.
You can get one at:
Can I clarify anything for you about this today, please?
If not, I would appreciate a 5-star rating for my answer. If you need anything further I am available for a follow up at no extra cost.