Adjust handlebar position/height (damaged screw?) I was trying to adjust the position of my handle bar...but might have turned the screw too hard in the wrong direction or perhaps it was like this earlier...not sure....

Is there anything that can be done or its too late ?

Thanks

Update 3 - Thank you All for the help !! This is now resolved, I was messing with the wrong screws...there was one underneath and that was the one I had to loosen to change the position of the handlebar - here is what had to be done

and thx to the immediate response from Pacific Cycles (Schwinn) letting me know what had to be done !!
Update 2 - I removed the other side screw and am attaching some photos, and a video which might give some more ideas. 

Update 1 - thanks for all the great suggestions folks ! I will try out the options and report back !!

The Bad screw (you might see that it is almost gone round)


The Good screw on the other side
If you find that it can't be fixed, then try to go with a solid stem that's already at the correct angle. I had an adjustable one before and after adjusting it, I could never get it to be tightened properly and it would always wobble.

A bike co-op or bike dump is a good place to look for parts like this as solid stems don't usually wear out and many of them are salvaged from old bikes that may no longer be usable.

Now that I think of it, I'm pretty sure the nut was rounded off similar to yours after many tries to remove the wobble. The adjustable  ones are usually low quality because they are heavier than solid stems, and people who buy more expensive bikes don't mind spending a few extra dollars to get a good fit.