Can anyone help out an idiot?

[Guest Kieswfc]

Hi guys looking for some massive help here and would be willing to pay someone for it. The help is need is iv bought two adults tickets by mistake in the family section and have been told unless we have an U17 with us at the gate that we will be refused, so basically looking for someone U17 to come in the gate with us in the family area or an adult that has 2 kids going with them to allow one of the kids to come in with us? Would be massively grateful because otherwise we won't be able to go. It's in the family block 139 entrance H thanks a lot guys