A: If you believe you have 'cause'to evict the tenant you must issue her a notice to end the tenancy on RTO Form 3. You must cite one or several of the grounds found under section 47 of the Act and be prepared to prove it before an Arbitrator. If you issue the notice the tenant has the right to dispute within the time lines set out, which means you'll be off to arbitration with your evidence and she'll be there with hers.
You indicate that you only have one written complaint at this point. I think it is unlikely that this alone will satisfy an Arbitrator that this tenancy must end. Before an Arbitrator will throw somebody out of his or her home they generally want to see much more detail and a higher standard of proof.
Your oral evidence might bolster your case a bit. Police reports, eyewitness accounts, video tape, documentation, etc. can also be helpful in cases like these.