On the Spark website:-
Spark has become aware that some of its customers have been contacted by fraudsters claiming to be an IT specialist from Spark and calling to ‘help make their computers secure’. Also they are asking the customers to download software, access their internet banking and register for a certain type of payment, threaten to disconnect the customer’s broadband and/or prevent them from getting service from another provider if they don’t comply with their instructions.
Spark will never call you out of the blue and ask for personal information, particularly financial information or passwords. If you receive a suspicious call, the best thing to do is hang up. If you’d like to let us know about it, or have questions or concerns about the call, you can e-mail us at firstname.lastname@example.org
We got such a call last week from someone with a Pakistani or Indian accent (alarm bells already) claiming to be from our “Internet service provider”. Needless to say, upon the responses to a couple more questions by us, the call was terminated at our end within a few seconds.