Hi and welcome
The new figures are so bad that something must have changed dramatically. Have you changed anything at home, such as connecting the router to a different socket, changing filters or anything like that?
Does the phone still work? One thing which can cause this sort of collapse in performance is when one of the telephone wires becomes disconnected. The phone stops working altogether, but some sort of ADSL signal can still be obtained.
If these things are eliminated, then you need to connect the router to the test socket, to make sure that your internal wiring isn't causing the problem. If possible, try a different router and different filters to eliminate those things as the cause.
