What is the way to rectify the situation of an accident in which responsibility was shifted from the second party to the questioner? And what is the ruling on the questioner taking the value of his car after the accident and returning the difference to the insurance company? And is it obligatory to return the amount that the company paid to the second party?

You have committed a grave error by stating something contrary to the truth regarding the incident. You must repent to Allah by restoring rights to their rightful owners. The sum of 25,000 paid by the insurance company to the other party is not permissible for him to take, as he is the one at fault. As for the amount the company paid you, it is permissible for you to take what you would have been entitled to if the company had known the truth of the matter. You must rectify the situation with the company so that what was taken from it unjustly is returned.