Nothing easier.
Go to your alerts by clicking on the bell icon next to your profile picture, then click on “My alerts”.
Look for the alert you want to change or delete. You can use the search bar to look by asset name / symbol / ISIN and the filters by alert type / status.
Once you’ve found the alert, you'll see two small icons: a pencil and a trash bin.
The pencil lets you edit the alert (you can change everything except the type) and the trash bin lets you delete it forever.
