Point out that the fault previously logged has not been satisfactorily fixed and you require them to insist that Openreach complete the job. Openreach may have closed the fault but that was an incorrect action.
It would appear I have fixed my problem. While playing around with my DNS setting I had to disconnect and then reconnect. Guess what my speed is now back to normal again So all it needed was to disconnect the modem and then reconnect it. Shame I never thought of that sooner!
I can now look forward to the Planned Speed Upgrades soon and from what the BT Engineer told me I can expect 67Mbps Down and 18Mbps Up. Seems we have come a long way from my first 1200 Modem and Bulletin Board days