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Hey @Dylann992, welcome to our AndroidForums.
Have you rooted or tried to root your device (or installed a custom ROM, etc.)?
That is a likely reason for what you're seeing/experiencing...
Search for triangle away and see if you run that if they helps
What is the complete model number and Android version of your S3?
Some models stopped receiving updates at 4.3, others at 4.4.2.