What is the solution for a married man who finds it difficult to stop masturbating to pornography due to his wife's repeated refusal of intercourse, given the impossibility of a second marriage?

The questioner must immediately repent to Allah for watching pornographic films and masturbating, as both are forbidden, and their prohibition is more severe for a married person. The wife must also answer her husband's call to bed unless there is a legitimate excuse, otherwise, she is disobedient. If his wife does not satisfy his needs and he is unable to marry another, then he must fast, guard his hearing and sight, stay away from temptations, occupy his time with beneficial activities, and seek Allah's help.