I forget my apple id and password so i can't open my phone

None of use believe you.

You bought a used iPhone, right?

Recycle it. You will never be able to use it.

Apple will not help.

You find the person who set up the activation lock or you recycle it and buy a phone you can use.

Obviously you can’t get their help so your only option is to recycle it. It is useless to you.