Forgot to grab Kirac's Vault rewards before league end

Not sure what to do or if I'm out the 300 coins but I got the Kirac's Vault Pass and did not complete all of it but got to the last one. I did not go to the vault though and retrieve the loot boxes because I forgot. Is there a way that I still get these or a refund of the 300 points? Or if I am just out of luck. I understand it was my bad but just want to know if there is something more on my end I can do to either get the items or points back.