Since downloading IOS 7.0 on my iPhone 4 I do not have the ability to connect to wifi. I can't even move the on/off button at all. Also, the "personal hot spot"

Since downloading IOS 7.0 on my iPhone 4, I cannot connect to wifi. The button is greyed out, so I can't even turn it on. I can't download the upgraded version that fixes some of the bugs because you have to be able to connect to the internet to download it. I also noticed that under "Settings", my Bluetooth and Personal Hot Spot settings are constantly roaming with the circle that just keeps going around and around. I've tried everthing (I think). It was directly related to the 7.0 download because it happened right away. Any ideas? I listen to a lot of eBooks when I commute each day and I need to connect to the internet to download the full versions. I miss my books!! 😟