There isn’t enough elbow grease that could wipe out a bad mold problem.  An urban myth usually states that 1 part bleach and 9 parts water will help remove mold from your home. After adding this solution to a wall, its more probable that you just added water to a mold problem,

How long does is take to clean mold from a wall? Well, if it is done correctly and with the right building materials, once.

Different solutions have been made for mold removal and mold cleaning over the years.  Without a proper understanding of the water (moisture) intrusion, mold will be difficult to remove or clean.