I tried to wipe the data from my iPhone 4 since my mom took it and I will never be able to use it again. Whenever I tried to do that though it says it's pending and won't wipe all the data from my former phone. Is this normal?

What you're saying is really confusing

You're supposed to go to settings → General → reset → erase all contents and settings

I don't have the phone. I have tried to wipe all the data on it online and it doesn't work.