Number = +44 20 7193 3657 / 020 71933657 / 20 7193 3657
You may have seen the above number on fake eBay invoices or other such scams.
The scammers send e-mails to users that contain fake eBay invoices in the hope that people will ring the listed number (usually stated as customer services) once you call the number they will attempt to obtain bank details in order to remove funds from your bank account.
Do NOT call this number, or answer this number if it calls you.
Example text from an e-mail with this number is shown below :-
Blogger at www.systemtek.co.uk