"I believe the contract has been broken by Vodafone," Teresa Corbin, CEO of the Federal Government-funded Australian Communications Consumer Action Network, said.
Ms Corbin said Vodafone had sold services that had not worked well for a sustained period.
"There is no question that this has caused significant detriment to customers," Ms Corbin said.
Ms Corbin said that constituted a breach of contract.
If you are one of those customers who have experienced poor reception on Vodafone, let us know if you have been successful in cancelling your plan or receiving compensation.