Welcome to SAYNOTO0870.COM.
If this is a number that is calling your phone, then the organisation making the call is breaking the law because Premium Rate Service numbers should not be presented as CLIs (calling line identification - the number of the caller shown on caller displays and given via 1471 etc).
Putting the number into Google brings up links to discussion on this number.
Postings on Whocallsme.com suggest that it is Horizon Finance:
http://whocallsme.com/Phone-Number.aspx/09064001838Have a look at those links and read the comments. Please let us know if you ascertain who it is as this will help others who read this thread.