It looks to me that you used a thick vinyl to try and make this turn with. I suggest that you try to pull the vinyl/foam back off and apply new glue and warm up the vinyl with a heat gun to make it more workable, than reapply to the panel.
Also, in the future try not to add too much pressure to the vinyl right after you glue it.
Wait about 10 to 20 mins to let the glue dry. If you add too much pressure while the glue is still wet the foam will collapse and leave indents like you have in your rear panel.
If the vinyl still wrinkles after you reapply it, try using a thinner vinyl that can make the turn.