Try a 'quiet line test' if you have a BT line. An old thread but still valid; click here
If line ok and filters changed then I would return to your ISP for complaint. Tell them of the test and change of filters.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.