I had this exactly the same last week, it's mad how they can just go to shit like that!

The lifters that wont come out the top just drop out the bottom mate after removing the cam, easy.
If you have scored the bores then you may well have written your head off, because you'll need to remove those score marks and depending how deep they are the lifter will have to much play and you'll have no oil pressure for that particular lifter
I take it you pulled them out using a pair of pliers rotating them left to right as you pulled?
If your head is ok, then flush the engine a few times to remove the remains of those lifter bottoms, new oil and filter.......... in fact do this anyway!!
I feel for ya mate! Good luck!