Those plugs can be a pain. They are soft plastic and I have had a couple that were so stubborn that the screwdriver blade chewed the top of the plug off. I just took a smaller screwdriver with a thin blade and rapped on the handle to drive the screwdriver into the soft plastic, then backed out the plug. don't worry too much about salvaging them.
Thanks Ericbc7 My plugs are all removed thanks to your help I did have to tap a screwdriver in to the plugs and removed he first one that way but found if I removed the bolt they would drive out using the same method Thanks again