Locked out of my voicemail need to set my voicemail

VoiceMail (Visual or Normal) is a Carrier Specific feature. Contact your Carrier (Cellular Service Provider), the agency that issued the SIM / eSIM to you.

You have received two responses to your question and both have instructed you to contact your cellular carrier. Voicemail is a carrier feature and they are responsible for fixing any problems.

You need to contact your carrier’s tech support.