How to fix my seat belts in my truck? ( Ford F-150)?

How to fix my seat belts in my truck? ( Ford F-150)?
Added (1). How do I fix my seat belts? That are stuck and the mechanics couldn't make them unstuck. How to fix them myself? Also my horn isn't working. How to fix that? One more thing. My window sprayer on the driver side will spray but not up high enough onto the window, is something blocking it?

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