pampers diapers are horrible!!!

I have been having lots of trouble with the Pampers diapers. My 8 month old son wakes up at 3am every morning soaked through his clothing. I have tried changing diaper size, gone up from 3 to 4 to 4+ but he still wakes up soaking wet through to his clothing. I change my sons diaper before he goes to bed and the package on the diapers promises 12 hours of dryness. He is on the active baby dry range. This is unacceptable for a brand that's highly priced . I have contacted pampers directly only to receive an email apologizing for my experience and nothing further has come of this. I have 2 giant bags of these diapers and my son cannot use them.