I see one of those big, white, plastic, screwlike thingy's, they sell and say "will hold up a battleship", but won't hold up a toilet paper holder will they? Unfortunately, the hole this thing left may be too big for a toggle bolt the correct size to help you. You could get a toggle bolt and try, let's hope it works. If this doesn't work, the you may be into placing a piece of 2 x 4 between two studs, behind the sheetrock, so you have something to really anchor the toilet paper holder to. If you are not a DIY person, maybe you can find a good Handyman type person who can do this for you at reasonable cost. OR, post back on this and we will walk you through this job, and reward ATTABOYS also. Good Luck, David