If the erector tube is broken free, it's toast. If a glass etched reticle breaks free within the erector, it's toast. Unfortunately, Western Field is most likely out-dated enough such that the original manufacturer (I believe Tasco?) won't honor warranty/guarantee replacement or repair.
Luckily, however, it's a cheap scope. Replacing it with like-kind would be cheap.
Replacing it with BETTER-kind would be advisable.