if your in ireland on ntl you wont get them back,if your in the uk then try menu,factory reset,language english,installation,auto scan on your provider,emu on.to find emu menu,and on installation type in 1570,on bottom of the screen emu on,exit back to tv.
delete the ones you are missing and do a manual scan on 150.000 and you will find them there they have moved freq that's all