OK GUYS GOOD GAME BUT ONE PROBLEM

OK THIS PLANE THE RFA37 IT SAYS THAT U UNLOCK IT BY DEAFTING THE 30TH WAVE IN SURVIVLE MOD . BUT IN MY ACHEVMINTS IT SAYS THAT I DID GEAT IT BECAUSE I HAVE IT IN RED AND IT SAYS I ACHEVE IT SO Y DO
I NOT HAVE THAT PLANE? ? PLEASE FIX SO I CAN HAVE THE PLANE PLEASE FIX.

WW11 simulator about Sky Gamblers Air Supremacy, v1.8.2