lease vs by laws

 I have a sticky situation whereby i signed a lease with a clause added that i could ‘have the dog stay occassionally but not reside on the premises’.  A few things have happened in my first weeks in the property:

– the owners in another unit complained (within the first 24hrs of us moving in and the dog was being relocated the next day, she didnt bark, bite or do anything to cause a complaint other than just exist)

– after the complaint by the (lawyer) neighbours, the landlord says she never approved the clause  and that the agent made it up!

– the landlord verbally told me she was ok with the dog but has since changed her mind.

– I have been told pets are not permitted by the strata by laws but no one can produce the document for me.

I would like to know where I stand legally? What are my rights in this situation? Does my signed  lease override the strata by laws? I was not given the by laws when i signed the lease. Its not fair that I suffer because my landlord did not manage the lease signing properly, nor did she get approval from the owners corporation etc but why should i have to move or be without my dog??

 It feels very unfair 🙁  can anyone help or point me in the direction of legal advice? . Thanks