My iphone is reset and i didn't know what to do

Why would my iphone didn't want to connect to wifi

See the following Apple articles:

Connect to Wi-Fi on your iPhone, iPad, or iPod touch

https://support.apple.com/en-us/HT202639

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network

https://support.apple.com/en-us/HT204051

after reset it the password didn't pass the correct password what's the problem it is?

See this Apple article: If you forgot your Apple ID password

https://support.apple.com/en-us/HT201487

Then see this Apple article: What to do after you change your Apple ID or password

https://support.apple.com/en-us/HT204071