Nigel Dowdney, who owns two stores in the city, is urging anyone who has experienced similar difficulties to make contact so that a dossier of evidence can be presented to authorities, with the support of the Association of Convenience Stores.
Nigel says he has received incorrect invoices and been subjected to bullying, lies and threats. His problems stem from a mix-up which saw him pay one company for his energy while unknowingly receiving his supply from another.
He told Convenience Store: "I've been appalled by the aggressive way in which these companies deal with customers. I was threatened with having my supply cut off, and bailiffs visited and told my staff I owed thousands of pounds.
"I want to find out how many other people this has happened to so we can go to Energy Watch with the evidence. I've spoken to many businesses who have been treated poorly and it's time something was done."
l To join the campaign, email your complaint to email@example.com, or write to Earlham Shopper, 9-11 Earlham West Centre, Norwich, Norfolk NR5 8AD. Label your correspondence 'Utilities'.