Thanks for highlighting this - I've taken a look at your account and there's a potential connection issue that I'd like our suppliers to take a look at.
Could you please connect your router to the test socket as shown here and if that doesn't help to resolve your speed issue please raise a fault here.
Just bear in mind that you'll need to be testing the speed on a wired connection to get a "true" representation of the speed that's been provided to your premises (once this is sorted, we can look at the wifi as a secondary concern).
Please let us know if you raise a fault.
If this post resolved your issue please click the 'This fixed my problem' button