I've seen wrinkled Seneca's; quite a few of them. However, without seeing the aircraft, addressing the poster's concerns is rather difficult.
So far as the English language...it's not everyone's native tongue. Regardless of whether his diction is perfect, I believe we understand what he asks. Rather than respond with sarcasm and nothing of use, one might well try to answer the question.
I've seen Senenca fuselages and wings with wrinkles. The Seneca has a very insubstantial fuselage which is easy to twist or damage. Hard landings, rough field use, frequent exposure to significant turbulence can all result in visible wrinkles or oil canning and deformation to some degree. I flew them from rough airfields in the mountains and saw those very things. I never bent or damaged one myself, but it such damage can certainly be expected with hard use. In fact, many aircraft develop wrinkles and stretched skin with use and age, regardless of their operating conditions.