Hi annhashoyas,
Can you upload a photo or two, showing the pot and the soil?
I don't usually repot anything right away due to the plants already having experienced the stress due to being boxed up and spending time in transit. The nursery likely soaked the plants prior to shipment in hopes of keeping them from drying out during travel time and repotting right away will subject them to additional stress. I'd allow them to acclimate to their new surroundings for a few days before making any changes. Some nurseries use a heavy, water-retentive soil to prevent the plants from drying out during shipping and I usually always change plants out to my own potting medium after a period of becoming acclimated to the temperatures and conditions of my home.