Missed an Assessment Centre/Superday

Ignore my username, it's just there for anonymity.

I'm a US-based student who's been applying for junior internships. I've cast a wide net (many different roles and many different locations). I've also applied for internships across the pond since after Brexit BBs in London have become very open to sponsoring since the local talent pool isn't large enough. 

I applied for the JPM Securities Services Leadership Programme - Summer Internship. I received an email for an invite to a virtual AC for the position two days before it was held and was surprised at this since it went straight from a non-selective hirevue to AC with no first rounds or any other filter between. 

The email invite was sent very early morning my time before I was awake (later time in the UK of course). When I saw the email I went to RSVP but it said the virtual AC was filled to max capacity. I emailed the EMEA recruiting team and they said: "Unfortunately, the Assessment Centre session on December 4th has reached its maximum capacity, and we currently do not have any additional spaces available. Our recruitment process operates on a first-come, first-served basis, and we apologize for any inconvenience this may cause."

Overall this all seemed unusual to me since normally, at least the way it works with superdays in America, you get a call from a recruiter and they aren't overfilling the superday and your spot only gets let go if you don't call back by the RSVP deadline date. Also found it unusual there were no first rounds or anything else selective before AC.

Questions for those more experienced than me in EMEA recruiting: firstly, is this process of overfilling ACs and sending invites on a first come first serve basis normal? Or is this something specific to this role since it's a MO role? 

And most importantly here am I shit out of luck? Or should I ask the recruiting team if I could be waitlisted for another AC after this (if there is one)?