Zafira Life Sliding Door Problem

Hello, I have the following problem: On the driver’s side the electric sliding door closes no longer correctly. It drives to the end but no longer pulls into the cover. and then stops. opel has tried to repair it twice so far but it does not get it. Also the gap dimensions of the door is not correct and if it is closed, the door stands opposite the body 2-4mm. Down in the right corner it is so crunchy that the paint at this place is already damaged. Otherwise noc h anyone this problem?