What should a girl do to repay the debt of teachers whose wages she did not pay four years ago, knowing that she cannot contact them and feels embarrassed?

The right must be returned to its owner, if alive, or to their heirs, if deceased, by any means possible, without informing them of the reason for entitlement. If one is unable to reach the owner of the right, or is unaware of them, then they should give it away in charity on their behalf, or spend it on matters beneficial to Muslims.