Replace Fan with Light Fixture

I have just removed an old ceiling fan and now need a qualified installer to put up the single fixture with three lights that I’ve already purchased. The junction box and wiring were left intact during the removal, so everything is live and ready to accept the new unit—no additional electrical work should be necessary. What I’m looking for is a clean, secure mount that sits flush, balanced, and properly aligned, followed by a quick test to confirm all three bulbs illuminate on the first switch throw. Let me know your earliest availability and how long you expect the job to take so we can schedule a convenient time.