You mentioned you thought the fish were coming in a couple months so were you still working on building up the pond (more live rock, etc) to handle the amount of fish you bought but now you're caught short because the fish are coming next week? If this is the case and your cycle has finished then you can probably add some of the fish but the others will probably have to be kept elsewhere until you finish building out your pond and add them slowly after this. If there is nowhere to keep them then you need to get your pond done as quickly as possible (adding live rock, etc) and get something like seachem prime to help with ammonia and be prepared to do plenty of water changes. In some cases even a system that has been fully setup can't handle a massive bioload at once without some of the inhabitants dying. Even if the fish arrived in a couple months and your pond was fully setup it might still be too much at one time.