Hi @Biddy-r, thanks for your post and I'm sorry that you're having problems with your landline.
Are you able to kindly advise if:
1. You've made sure all of the connections are secure in your handset.
2. If the battery is fully charged on the handset.
3. What happens when you try and call out, is there any error or tone displayed?
4. What happens from the dialler's end when they try and call you, does it go straight to voicemail for example?
Please respond to these questions and it'll enable me to troubleshoot further for you.
Regards
Tom_W