They actually removed the code from my account after using it 1 time earlier today. I emailed them and I got this response:
Hello Geshmak25,
We greatly appreciate that you took the time to reach out to us today.
After further research, unfortunately the promo code you were trying to redeem are for first time members only. Rest assured I did apply a different code towards your order thats in your cart. I apologized for any confusion that this may have caused.
Please let us know if there's anything else you need help with.
Thank you for being a part of Jet. Have a great day.
Meisi L