Hi,
Try Below
Open the Phone app Phone.
It's the icon that resembles an old fashioned phone. Tap the icon to open the Phone app.
Tap the Menu icon ⋮.
It's the icon with three dots in the upper-right corner of the Phone app. This displays the menu.
Tap Settings.
It's one of the options listed in the menu. .
Look call-forwarding option.
Where this is located will be different depending on the model of your phone and your carrier. It may be under More Settings, Advanced, or Supplementary services.
Select the call-forwarding option. This will usually say something like Call forwarding or Forwarding settings.
Tap a Call-Forwarding setting.
The call forwarding options are usually something similar to Always forward, Foward when busy, Foward when unanswered, and Forward when unreachable. Tap one of these options
Tap Turn off.
This disables call forwarding for the option you selected. Repeat for all options.
This will disable calls from being forwarded to your voicemail
