Many people here have good solutions to your problem, here is another.
Take advantage of the promotion bonus you are undoubtedly getting and raise your ticket price a bit.
The team that got you there won't keep you there so identify which starters or players of value you could part with, and use that money along with the promotion bonus to get a couple of good players.
PM me for one last point I will share with you, there are two GMs from my big 8 division already giving you suggestions. :)