Zest4 launched in November 2004 but on February 3rd 2006, they were forced to go into liquidation. OFGEM appointed British Gas as the supplier for all existing customers of Zest4 and all customers were automatically transferred to British Gas on 4th February 2006.
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ZEST4 had less than 200 responses in our survey, so we can’t show a customer service rating. See ZEST4 reviews