Hello Linda & Welcome to Just Answer,
Sorry to hear of any issue you are having with your phones.
To help you with this issue, may I ask:1) The Make & Model Number of the phone system you are working with? If a cordless system, that model should be printed on a sticker on the bottom or back of the main base unit.
2) What phone service provider (phone company) you have for this phone line?
3) Can you tell me if you are using an internal answering system in your home OR the provider's Voicemail system to pick up your missed calls?