Yes, i removed the face plate for the test, you say the most my line will handle is 39meg, when i go on the BT site and put my details it says the min guaranteed spped is 60meg
You will be advised of a possible charge but as you've proved no fault in your home by doing the requested tests then it will be free.
Because the fault still exists when you connect to the test socket. By removing the faceplate you have disconnected all your internal wiring that would be chargeable and are only connected to the Openreach responsible infrastructure. That is the purpose of the test socket, to provide a demarcation point.