My iPhone will not let me get my updates

Try using a Mac or PC and running the update by plugging in and trying to update from Finder / iTunes respectively.

Or visit an Apple Store and they will do it on one of their computers.

You can also learn more here: If your iPhone, iPad or iPod touch won’t update – Apple Support (UK)

See the articles below.

Update your iOS device.  -

Get help with over-the-air iOS updates  -

Update – Can’t or can’t restore   -

If you see an error when you update or restore your iPhone, iPad, or iPod    *

Updating iOS: common issues and solutions.  -

https://www.youtube.com/watch?v=csJAEyvvruY