Hi @WiFiproblem1, welcome to our community!
I'm sorry to hear about that. 
For how long have you been experiencing this behaviour? Did it start to occur after you updated your phone or installed a new application?
If you open up Settings in your phone and tap on Wi-Fi, what happens when you try to enable Wi-Fi here, does it go back to off directly again or is it not possible to enable it?
You can also try to enable Wi-Fi in the quick settings in your phone, put 2 fingers at the top of your screen and drag them downwards > tap on the Wi-Fi icon.
I would recommend that you reboot your phone in safe mode to make sure that this isn't caused by a third party application your phone.
Let me know how it went! 
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