If you haven't yet received an enrolment email from Jarvis, that means your employer hasn't yet enrolled you.
You may have received an email from you employer about enrolment but this is still being processed.
Once your employer completes the enrolment, you will receive a welcome email from Jarvis with all the details you need, including how to opt out if you wish.
My pension has been deducted from my salary:
You may have noticed that your pension has been deducted from your payslip. Please note that your employer still needs to make a pension contribution for you. Once you have been enrolled, you'll be able to opt out and get a refund if you are still within your opt out window.
Your employer will be enrolling you within the next 7-14 days and once they do, you will receive the email.
For now there is no action to take. 🙂