Try telling the manager of your apartment complex to see if they will clean up the mess.
Also consider using borax or some other cleaner on the rug in case the big vermin was carrying little vermin (which might have survived the bath).
Ed
P.S. If the rat came up through the sewer, everywhere it might have gone needs to be cleaned. That might include the sheets, blankets pillows, bedspread, etc. I'd probably include a mighty dosing of Lysol spray over the stripped down mattress.