求救~ 我部miniz 個轉向摩打一開remote 就不停轉...轉唔到彎...!!!

果日同部miniz monster 去石灘玩... 點知玩玩下發覺轉唔到彎... 拆開即發現個轉向摩打一開remote 就不停轉...令到個鈦完全轉唔到彎...!!! 點算呀?

求各住大佬指點下... 拎出kws 有無得整?? 唔知係咪個電版出問題... 唔知要整幾多錢呢!??好擔心呀~~