Help...Iphone 5c settings changed by themselves

I have an iPhone5c and today my settings changed automatically by themselves and when I have attempted to change them back they will not stick.

Specifically my battery percentage has disappeared and my message settings have changed as well. I had my settings to where there would be no message preview but now there is a preview and I am unable to change them back when I select those options. I change the setting back to how it was but then it reverts to how it automatically changed.

Can someone please assist me with how to fix this!? Aside from paying $30 or making an appointment, I was advised this was my only option.

Thank you in advance!