I need to unlock it but I haven’t any Mac or Laptop

I haven’t any Mac or Laptop

You don't need a computer, see this Apple article: 

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode

How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support

If you forgot your iPad passcode - Apple Support

If you don't have a computer and you can't borrow one, you need to go to an Apple Store or Apple Authorized Service Provider for help.