When trying to remove an eSIM, it is important to note that you can do so at any point, and you have no obligation to keep using it. However, your data plan will cease to work on that device and you will need to either reactivate it on a different device or purchase a new plan to keep using data
You’ll need to go into the specific settings of your device and access the data plan to turn it off. This should be clearly labelled for you.