ECV from scooterbug

[Amydisneyfan]

If I order an ECV from scooterbug to the Disney resort I'm staying does it have to be picked up within an hour from chosen time because I thought you could pick up at own convience and I checked cormfirnation that it has to be picked up within an hour from Bell service and I haven't left myself enough time as I selected 3pm and I get to MCO airport at 3.30pm and about time I collect luggage and get Uber I don't think I'll make it on time.
Does order get cancelled if about 2 or 3 hours late because I thought you can pick up at own convience.