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This is not a criminal matter so the police cannot help.
This is a civil matter.
What you can do is retain a lawyer to send them a letter demanding they cease and desist, provide you with a written retraction and formal apology, provide you a set amount of funds for loss of business that you determine is fair and provide a deadline for complying and threatening a lawsuit where you will then also seek an order for your costs.
You would need a lawyer that deals with landlord tenant matters.
You can contact the BC Branch of the Canadian Bar Association and use their Lawyer Referral Service. You will be given the name of a lawyer and can consult with the lawyer and the first half hour will be $25.The number is:***-***-**** or 1.***-***-****.