I'm no lawyer, just taking reference from the Australian Consumer Law: as a consumer of a product or service in Australia, consumers have the protection of the ACL.
Misleading or Deceptive Conduct
It is important to look at how the behaviour of the business affects the consumer’s impression of a good or service. When deciding if conduct is misleading or deceptive, or likely to mislead or deceive, the most important question to ask is whether the overall impression created by the conduct is false or inaccurate.
Business conduct is likely to breach the law if it creates a misleading overall impression among the audience about (for example) the price, value or quality of consumer goods or services. Australian Consumer Law - Avoiding unfair Business practices, p6.
Predictions and opinions
A statement about the future that does not turn out to be true is not necessarily misleading or deceptive. But promises, opinions and predictions can be misleading or deceptive if the person making the statement: • knew it was untrue or incorrect • did not care whether it was true or not • had no reasonable grounds for making it. Australian Consumer Law - Avoiding unfair Business practices, p8.
Unconscionable conduct
Examples of unconscionable conduct by a business may, depending on the circumstances, include:
using high pressure tactics, such as refusing to take ‘no’ for an answer, sustaining a sales pitch for a long period of time, or refusing to leave a consumer’s home. Australian Consumer Law - Avoiding unfair Business practices. p16
Harassment and coercion
It is unlawful to use physical force, coercion or undue harassment in connection with the:
> supply or possible supply of goods or services
> payment for goods or services
> sale or grant, or the possible sale or grant, of an interest in land, or
> payment for an interest in land.
Undue harassment means
unnecessary or excessive contact or communication with a person, to the point where that person feels intimidated, tired or demoralised. http://consumerlaw.gov.au/files/2015/09/sales_practices_guide_dec_2011.pdf p25
On a legal front you will need to point out what laws have been broken.
