Where are the pictures? As Ted wrote, speak to your agent or the manager of his or her office. If it's on Zillow, Trulia, the CMLS you can also speak to them directly.
THERE ARE TIME FRAMES THAT THE MLS ADHERES TO BEFORE THE PICTURES ARE REMOVED. BUT EVEN THEN THE MAIN PICTURE WILL STILL BE INCLUDED FOR UP TO FIVE YEARS, THIS IS BECAUSE AGENTS NEED THE HISTORY OF SALES ETC TO PREPARE COMPETITIVE ANALYSES. HOWEVER SPEAK TO THE AGENT WHO REPRESENTED YOU ON THE PURCHASE. HE OR SHE WILL BE ABLE TO ASSIST YOU AND DISCUSS YOUR PARTICULAR CONCERNS WITH THE MLS SERVICE. IF THE AGENT IS NO LONGER AROUND, TALK WITH THE BROKER. HOPE THAT HELPS.