Is it considered forbidden not to wish repentance for someone who has wronged me and taken my money, and to pray for them to become more astray?

The wronged individual holds a significant status with Allah Almighty, and they are permitted to supplicate against the oppressor, as Allah Almighty says: (Allah does not like the public utterance of evil speech, except by one who has been wronged) (An-Nisa: 148).

It is preferable when supplicating against an oppressor to use formulas transmitted from the Prophet (peace be upon him), such as: (O Allah, make sound for me my hearing and my sight, and make them the inheritors from me, and grant me victory over whoever wrongs me, and show me my vengeance against him), and (O Allah, apportion for us from Your fear that which will come between us and Your disobedience... and make our vengeance against whoever wrongs us, and grant us victory over whoever shows enmity towards us).

It is not permissible to supplicate against an oppressor for misguidance and lack of guidance, because: 1. It is a request for the continuation of sin, which contradicts a Muslim's dislike for sin. 2. It is an transgression in supplication, which is forbidden by Islamic law. 3. It limits Allah's vast mercy and forgiveness. 4. Allah forbade His Prophet from such supplications related to increasing the misguidance of disbelievers.

Some have cited certain evidence for the permissibility of supplicating for misguidance, including: 1. Moses' supplication against Pharaoh: (Our Lord, obliterate their wealth and harden their hearts so that they do not believe until they see the painful punishment) (Yunus: 88). The response to this is that it came after a revelation from Allah that Pharaoh and his people would not believe, and it is not an absolute supplication. 2. Sa'd ibn Abi Waqqas' supplication against the man who accused him: (O Allah, if this servant of Yours is a liar, who stood up out of hypocrisy and seeking reputation, then prolong his life, prolong his poverty, and expose him to tribulations). The response to this is that Sa'd supplicated against him for tribulations, which mean hardships and afflictions, and not a request for sin.

The best course of action is forgiveness and leaving the matter of the oppressor to Allah Almighty, because whoever forgives their right in this world will receive it in full in the Hereafter. The Prophet (peace be upon him) said: (Forgive whoever wrongs you).