Buy a new racket of string?

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My badminton rackets were all broken during last month. Frist, the Oliver racket frame broken when it hit another guy's during a double game. The Yonex racket string broken last Friday, maybe caused by the tight string, I gave it a 22pt, I feel it was a little bit too tight. Comparing the price of stringing for third time and new Oliver racket, I will thing about to buy a new Oliver. My first post. :D