I have purulent inflammation from the tooth, and for this lockjaw and nothing helps.

Thank you for sharing your case. With a tooth abscess, the basis is dental treatment, which can be supplemented with antibiotic therapy. You received two different anti-infective drugs - Metronidazole and Augmentin, which have microbial-destroying properties. If after 3 days of treatment you do not feel any improvement, or even deterioration, then you need to contact your doctor. However, treatment should not be discontinued until consultation. Jawbone is a direct consequence of the abscess and the inflammation it causes. If you have difficulty eating, you can try to eat mixed meals or use specialized preparations: https://www.gdziepolek.pl/artykuly/zywienie-medyczne-w-walce-z-niedozywieniem