Keyless remote only works up close
 

I am new to this forum and recently bought a Mazda 3. I have a 2012 Mazda 3 and it came with one keyless remote. It never worked more than 5 feet from the car. Changed the battery and same results. So I bought a new 4 button remote and it functions the same. Is there something I can do to fix this? Any help would be awesome. Thanks!