Respuesta de SkatePro: Hi Nicholas, thank you for taking your time to give us feedback.
We're sorry to hear that the chain didn't work! Would you mind specifying by sending us an email to firstname.lastname@example.org what the problem was and if it's still present? We will try to do our best to help you and find a solution.
We're sorry that you had a problem with the ordered seat. There are different types of BMX seats and each type needs their own seatpost. This type is indicated in the product name as well as in the specifications. We're happy to help you find the right seatpost, if you need that. 😊 /SkatePro Customer Connection Team