Step 12 of the guide states:

 

 

 

12: Phoenix Gang: to the hideout

 

 

 

Go to your hideout in Varrock (if you forgot where it was; it's down the alley southeast of the Blue Moon Inn pub, and then down the ladder). Ask Stravan about the Master Thief Armband. After a bit of talking, you should get the password: "Gherkin". When you have it, go to your bank and withdraw some cash (100 gp is enough), some arrows and a bow. You will need to kill a level 26, so bring enough arrows. When you have that, head off to Brimhaven on Karamja and meet with your Black Arm Gang friend.

 

 

 

The underlined part is false because the "level 26" is actually a level 22. Proof:

 

[hide=Image proof][/hide]

 

 

 

Thanks to SportsGuy for helping me with uploading the image

If you need help with that, plenty of us are available...

 

 

 

EDIT: looks like you got it working! glad to help!