Hello & Welcome to Just Answer,
I'm Greg and will do my best to assist you today.
Sorry I didn't see your question earlier and to hear of any issue you are having with your watch.
If you still need help with this issue, may I ask:
1) The AGE of the watch?
2) Have the batteries in the watch EVER been replaced?
I ask these questions because the symptoms mentioned sound very must like the batteries (there are two) are wearing out and need to be replaced.
The battery type I see for this watch is SR927W, and these can be found listed online - at places like Amazon (Click Here for listings).
If you are a "do-it-yourself" person, these batteries can be replaced on your own, assuming you have the tools and time to do it.
Otherwise, I would recommend taking the watch to a place where you can get the batteries and have THEM replace them for you. Such places are often found in shopping centers and "strip malls".
If you want to see what it takes to replace the batteries yourself, I have a link to a video that shows the process on a typical Casio watch with two of these batteries.
Click Here for Video --> https://www.youtube.com/watch?v=bhTGER9RaUU
I hope this helps. Please let me know what you find or if you have any more questions about this watch.
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Thanks, ***** *****