My Smart had problems (reverse gear) after a check...

My Smart had problems (reverse gear) after a check there, which found that all gears go also the reverse gear!
Are you kidding me? Are you serious when you say that,
On the way home I noticed that it wasn't working ... the reverse gear could not be engaged. I paid 143 euros for this!
Allegedly a test drive was made on the factory premises and the gears tested. If that were the case, you should have noticed that the reverse gear only cracks and jerks