Restricted speed following line fault repair / DLM Reset

[#1]

I’ve recently had a line fault repaired after a marathon six weeks of messing about.  The voice circuit is now beautifully quiet and the (FTTC/VDSL) modem is now syncing at 22Mbps downstream.  (The line to the cabinet is more than 1000 metres so this is excellent and better than it’s ever been).  But speed test results never show more than 4Mbps downstream so I’m guessing that the line has been ‘banded’ by Dynamic Line Management as the line has spent more than a month down as low as 0.5Mbps.  I don’t want to wait 24+ days in the hope that DLM sorts itself out and no one is responding to the comment on the fault ticket, can I get a DLM reset?  

[#2]

This wouldn't warrant an engineers visit if your modem is syncing at the correct speed. It's the wireless throughput letting it down/bottlenecking your speed.

Check/change your wireless channels or change your router to something that offers a better wifi throughput.