Untamed dog - duty wise

My dog (female) is 1.5 years old. We haven't been successful in taming
her. I've tried everything I heard of, but still whenever we're not
around she allows herself to poop & pee in our house.

We tried to shout on her, but it haven't proven useful since usually
she poops & pees when we're not around so shouting a couple of hours
after the deed isn't very effective.

We tried to give her prizes whenever she poops outside, but still, to
no avail.

shelly...

First, stop shouting at her. It is counterproductive.

Second, contain her when you are not home. A crate is usually an
excellent tool for this. Make sure it is *just* large enough for
her to stand up, turn around, and lie down. If it is too large, she
may poop/pee in one corner of it. If it is too small, she won't be
able to rest comfortably in it.

Third, when you are home, supervise the dog so that she cannot sneak
off and have accidents. Every accident you allow her to have will
undermine her housebreaking.

Fourth, you have to go outside with her--at frequent, regular
intervals, to start with. When she relieves herself, immediately
praise her, give her a cookie, or do whatever it takes to let her
know that you are overjoyed with what she's just done.

It may take some time, because you've inadvertently trained her to
think that going indoors is okay. But, if you are consistent and
patient about following those steps, she *will* become house trained.

shelly...

You'd be better off ignoring the resident nutjob. His interest is
in disrupting the group, not in coherent discussion. Most folks
here have a pretty low tolerance for him and for those who insist on
playing with him. If you can't resist the urge to reply to him,
I'd recommend putting [Jerry] in the subject line. Otherwise,
you'll end up in most people's killfiles.

Any idea ? Are we too late ?