What should a wife do if her husband dislikes her family and prevents her from visiting them or accepting gifts from them, even though her parents are elderly and need her?

We advise you to discuss with your husband to understand the reasons behind his ill-treatment of you. If it is due to a shortcoming on your part, then remedy that and treat him kindly. Make it clear to him that he has no right to prevent you from accepting gifts from your parents or visiting them without a valid reason, especially as they are elderly and ill. If he does not desist from his wrongdoing, then let some righteous people mediate for reconciliation.