Range extender or hard wire sensors

i had some issues with our previous alarm carrier. They won't fix my Honeywell system in my business. They tried to strong arm me into signing a new agreement and demanding an $800 payment. Long story short, got smart with them, and took them up on their threat to cancel my services.

So decided to get SimpliSafe as a temporary solution until I can find a new alarm company for my business, but to be honest with everyone this is an awesome system. I installed 11 motion sensors, 2 cameras, and 6 door sensors.

I love the App based controls, and absolutely love the way the cameras work.

Here is my issue. I got another part of my office that are apparently out of range for a few of my motion sensors. Is there anything I can do to extend the range?

I tried moving the base unit, but it puts my other sensors out of range.  So I'm kind of stuck with the placement of the base unit.

Do they make a take over system or unit?  I got 60 wires sensors, and do they have anything where I can convert several wired sensors from my old system to work with SimpliSafe?

I know Comcast has a take over unit where I can connect several wires sensors and convert to wireless.

Any help would be appreciated. I'm very excited to have this system, love the features but I really need my hard wired sensors back.

Claude greiner