How to prevent costs increase for services used such as S3 and SageMaker in a region?

I've been notified that there's been a spike of sudden increase in my costs usage for instance ml.g5.2xlarge for training the model instance in west-2 region for deploying the SageMaker notebook using Meta Llama 2 7b-chat model. Even after shutting down the instances I can still see the 2 endpoints InService. Would like to know how can I stop to prevent further costs in my Billing dashboard. Here's the reference image of my account.