Hey how are you
1-is there any red security light flashing on dash ?
2- do you have one or 2 keys , try the other one if you do ?
if all you did changing battery & cables are back correctly & tight then lets try resetting it
Master reset Procedure
1- Disconect Battery Cables ( Negative & Positive Cables )you can use any electrical wire as an extension if battery cables don't reach .
2- Hold cables Together for 60 secs ,then let go
3- Wait 15 minutes
4- Make sure all doors are closed
5- Reconnect battery Cables
6- Lock & unlock the vehicles using the key from driver door side (if you have a key fob with no blade key, just lock & unlock using the key fob buttons)
7- Enter the vehicle and attempt to start
if that don't work
you will need a factory scanner or equivalent to run a diagnostic scan & retrieve fault codes
Please let me know if that worked for you
ASE Certified Technician