Paying for an account that is not active

A company called Mega Line who are sub-contractors to Neotel promised us a certain internet package. On instillation they arrived with a different package. We told them to cancel the instillation as it was not the product we agreed to. Neotel has since then been debiting my account for huge amounts of money for the past 6 months for a product that was never installed and we do not use. I have contacted Neotel over 10 times to get this sorted out and they always tell me someone will call me in 48 hours, no one ever does. the last time i spoke to a lady (Caroline) from neotel and she told me that the device that was meant to be installed at my property has been tracked to another property and i am receiving their account. She then deleted my banking details from the system and told me some one will call me in 48 hours. Once again no body called. Next minute i get contacted by a company called MBD Inc requesting the money . There service is ever worse and the people you deal with are absolutely rude. I am forced after 6 months of dealing with this to get an attorney involved and go to the consumer protection council to get it resolved. Do not use any of the 3 companies mentioned above