Poor Speed On Broadband Test

My broadband is running really slowly, I run both a Mac and a laptop of the router, I have turned off the wifi but it has made no difference to the speed.

I check with
UK Broadband Speed Test - See Your Street with StreetStats? - Broadband Speed Checker - uSwitch.com

and
UK Broadband Speed Test - See Your Street with StreetStats? - Broadband Speed Checker - uSwitch.com

My download speed is 0.6Mb
My upload speed is 0.7Mb

Which is extremely poor compared to the comparisons and on SKy it says 6.5Mb

Does that mean that someone has hacked into my router or my neighbours are using my broadband?

I have rebooted my router and I have reset it, but to no avail.

Please any advice gratefully appreciated.