Cook defends delay over $40 million Synergy error The West AustralianSynergy overcharged for 15 years, other companies have done similar Australian Broadcasting CorporationSynergy slammed over $40 million payment scandal affecting 170,000 customers of electricity provider 7NEWSAussies overcharged $40m on electricity bills News.com.auHeat on Synergy as Sanderson flags review businessnews.com.au
