some nomenclature:
 

Best is to have someone come over and assist.

The flexing will cause premature hinge failure if not cured. It might also cause breaking of the horizontal stabilizer and the elevator

The horizontal stabilizer is the fixed rear "wing" and the elevator is the moving surface attached to it.)

Rudder is the vertical moving control surface. Fin or vertical stabilizer is the non-moving part of the "tail."

Ailerons are the moveable surfaces attached to the main wing, giving bank control, moving in opposite directions from each other.

Without seeing the damage and attempted repair... its very hard to advise what to do to get it right. ANY binding is bad.

CA type hinges are difficult to remove if properly glued in. You can sometimes slide an Ex-acto knife along the top and bottom of the hinge, cutting it ou of the slot, but its usually better to just slot beside the bad hinge, and forget putting the new one in the same spot. I highly recommend a hinge slotting kit or the Great Planes hinge slotting power tool.

elevator repair
 

Sometimes you can get away with wood screws or sheet metal screws holding the lower nosewheel block (or the lower 2 screws if a single dual block unit) But you have to be CERTAIN that the screws won't puncture the fuel tank. (which makes a big mess inside the plane, besides making the engine not run correctly...)

Again... without seeing the damaged pieces... its difficult to give the best way to handle it.

I used to go ahead and fly a plane with a hinge lne causing flex in the elevator or horizontal stab... then I found out why my servo gears were stripping, and my battery pack was only giving 1 or 2 flights, and my tailplanes kept breaking at the fuselage. NEVER again will I pass a student's plane for further flight without it being repaired CORRECTLY. The chance of catastrophic failure is too high. The chance of the plane comming down in an uncontrolable condtion, possibly POINTED AT SOMEONE on the flight line or back in the spectators area isn't worth it.

Buy a copy of the Sept 2002 issue of Model Aviation. Read the District X Report. (page 166) His plane wasn't broken... I've seen planes shed control surfaces in flight and come down HITTING people! Luckilly the ones I've seen just resulted in minor bruises....