Hi, I'm Nathan.Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.
I would recommend against vtech, panasonic tend to be the most reliable phones on the market, followed by uniden.
Here is a model I'd suggest: http://amzn.to/2f277U2
It comes as a bundle with 5 handsets, a range extender, and with a headset that can plug into any of the handsets.
If you have any other questions, just let me know. Otherwise, please take a moment to rate my service as this is the only way I am credited for my time. Hopefully I have earned 5 Stars but if not please let me know what I can do to ensure you are satisfied. I also invite you to contact me directly with any future support needs at http://bit.ly/1QwLxGh and ask for Nathan.
Thank you, ***** ***** a nice day,