Q: having problem downloading 9.3.4 help how can I get to download

We need more details about the issue in order to help.

What does "it won't" mean? Please elaborate.

At what step in the process does IOS 9.3.4 refuse to install ?  How are you trying to install it, wifi or computer ?

More info on the problem will help with the solution.

Turn off (not put to sleep) your iOS device then restart it.

Make sure your device is backed up to iCloud or iTunes.

If you've been trying to update over the air try using iTunes, or vice versa.

If there is an error message please report the full and exact text.

See Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support for more.

tt2