Guild Wars 2

Im a member of the Tquila Killer Squad, and each time we do this evetn, i try to get this achievement, “Tail Flail” but without luck.
I have tried different dodges and many different places, but so far I have been unavailable to get the achievement. Some say it is bugged and some claim that it is not but just hard to get. Today i had my 60 Tequatl kill and my sick of never getting this archievement. Is there any advice someone can give me on “how” to get it? One of my friends suggested that I should just file a report of this and a ticket to Anet but i dont know if that would help.
Thanks for listening to me and my (somewhat) angry thoughts about this
And thanks for any advice with “how” to proceed.

I can find a post about this subject so that is why i am posting this
I just bought the Harvest sickle with infinite uses, and i am a bit sad that i was not active playing while the Molten alliance pickaxe was up in the Gem shop. I would love to get a chance to buy it. Ofcourse that is one of the benefits of being active in a game like Gw2 is that you are able to see the good deals and get them, but for a player who is working (like me, in the military) i cant seem to get enough time sometimes to see these things and collect the gold for these lovely items<33 !
Im just wondering if enough players would agree to buy this Molten Alliance pickaxe that maybe the ArenaNet would but it back for a week or two
Hope you guys feel the same way about this as me, Hope to hear from you guys
And sorry for my use of english ( if its bad)