When my packages arrived to St. Maarten via 4-star, I received an email. I called up the number, and asked that the boxes be transferred to the location by the Airport (about 5 minutes from campus). At the end of class, I went there, and everything was super smooth. Overall, it was the best experince I had with a business on St. Maarten.

If they told you that you will have to wait until Monday the 5th, then I would plan on waiting until Monday. Calling around excessively will likely not speed anything up.