Dash trim installation

Any expert out there? please help me on this
I have had a very hard time to place my flat trim peace on top of radio bezel, eventhough, I followed step instruction very carefull but it is alway leave me a gap and wringkle in the midle or below passenger seatbelt indicator where the curve started. this is second time i tried do it but its still the problem. Anyone experienced on this please help me out, all your help are greatly appreciated.
Thank you,