Hello & Welcome to Just Answer,
I'm Greg and will do my best to assist in TROUBLESHOOTING this issue today.
Sorry I didn't see your question earlier and to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) Please CONFIRM the FULL Model Number of the phone system you are working with? That model should be printed on a sticker on the bottom or back of the MAIN base station. I only ask because that model sent (KX-TGE212) does not appear to have a built in answering system.
2) What landline phone service provider (phone company) you have for this phone line?
3) Have you tried accessing the system remotely using a DIFFERENT touch-tone phone?
4) Can you successfully leave a TEST MESSAGE - using the current cell phone - and listen to it using the main base?
Please REPLY using the box below and the SEND button.
*** IMPORTANT NOTE: *** ANY requests for "additional services" (such as a phone call) are OPTIONAL and sent BY THE SITE AUTOMATICALLY (and not me), and I may NOT be available by phone.
Feel free to DECLINE (close) any such offers, and continue in this text/chat form.