Many people fall for scams, the guilty feeling after realisation can cause many of us to simply chalk it up to experience and bury the issue.
Which? Magazine are giving some good advice and guidance.
In the following link, they explain where you can start in an attempt to recover your money (or some of it)
I truly hope you are never a victim of fraud, in case you were or are this might help.
https://www.which.co.uk/consumer-rights/advice/how-to-get-your-money-back-after-a-scam-amyJW6f0D2TJ
