If you live outside the UK and have a complaint about a UK company this can also be made through Action Fraud. There will be a translation service.
The site also gives advice on how to avoid being defrauded and news on the latest frauds.
If you have a genuine complaint about a wine investment company I urge you to use this new service.
Action Fraud is the new place for you to find out about fraud.
Call centre opening hours:
Monday to Friday: 8am to 8pm
Saturday: 9am to 4pm
Sunday: 10 am to 4 pm
Call 0300 123 2040
How your report will be used
See also article by Julia Harding MW on Jancis Robinson's site here.