In order to delete the device, please follow the steps given below on browser.
Step 1: Login to www.intouchapp.com
Step 2: On the upper right corner of the screen, beside the profile picture, click on the down arrow.
Step 3: Select "Connected devices", you would see the list of connected devices for your account.
Step 4: Click on the icon beside the name of the device, you would see the option to delete the device.
Please login to www.intouchapp.com -> Click on the arrow next to your profile on upper right corner -> Select connected devices (you can see list of connected devices) -> Click on the number of contacts on your device -> You can see the option to delete the device.