"we will contact you by" date is today...?

Hi,
I was a late student finance applicant and it wasn't a straightforward application (estranged from parents and on disability benefits), on my account it has had a notification saying they are reviewing my evidence and will have an update by the 21st of October, which is today.
Should I be concerned that it's now 6pm and my account still has not updated? How often do sfe fail to meet deadlines they've set themselves? I will call them tomorrow but I just wondered if anyone has any insight, this is all causing a lot of anxiety, I knew it would take them a while but theyve set the date back once already and now they've seemingly missed it... I'm utterly skint having more outgoings than usual and significantly less income, I was hoping to at least know what was happening today!
Any advice appreciated, thanks!