Recently played a 2.20$ knockout tourney. This is my final hand

 $1.00+$1.00+$0.20 USD Hold'em No Limit - Level XII (200/400)
Table '1309445453 23' 9-max Seat #7 is the button


Seat 3: 28gramz (6985 in chips)

Seat 7: kaal3 (28180 in chips)

*** HOLE CARDS ***
Dealt to 28gramz [7c 7h]
mafkees911: folds
RJTH06: folds
28gramz: raises 400 to 800
Kevtwat: folds
cautiioN: folds
gabsdrogba: folds
kaal3: raises 400 to 1200
Olivium: calls 1000
Shurike981: folds
28gramz: calls 400
*** FLOP *** [2d Js 6s]
Olivium: checks
28gramz: checks
kaal3: bets 3200
Olivium: folds
28gramz: raises 2535 to 5735 and is all-in
kaal3: calls 2535
*** TURN *** [2d Js 6s] [Ac]
*** RIVER *** [2d Js 6s Ac] [Kc]
*** SHOW DOWN ***
28gramz: shows [7c 7h] (a pair of Sevens)
kaal3: shows [Qh Ah] (a pair of Aces)
kaal3 collected 15920 from pot
kaal3 wins $0.50 for eliminating 28gramz and their own bounty increases by $0.50 to $5.50
28gramz finished the tournament in 852nd place
*** SUMMARY ***
Total pot 15920 | Rake 0
Board [2d Js 6s Ac Kc]
 

if I know he's bluffing and I make which seemed like the right decision. Should I not have played my hand this way? Is it sometimes better to not play in fear of what may come on turn and river?

Sorry if this isn't the proper format this is my first post.