Can I ask for some quick Uni advice?

Hey, I really need some help/advice! Can anyone help me out?

Im a Canadian student and I've accepted King's College London as my firm and Kingston as my insurance choice. However, I didn't meet my exact conditions for my offer at King's, so I have to wait until after August 16th, when A-level scores come in, to see if they can guarantee my spot (I've already spoken to KCL about this) but I'm afraid that's too late. However, I am guaranteed a spot at Kingston. I would wait to hear from KCL, but my advisor said they'll take about a week after results come out, and it's up to me if I want to wait. But I have visa, loan, and accomodation applications to get through.

Should I wait?