Scratches by SB washbox

Hello dear forum community, ironically I have visited an ARAL SB washbox to avoid scratches. I had heard that the wash lanes can cause scratches on the paint. With a pure conscience I then took the brush and thoroughly and totally motivated the whole body of my new car brushed through. Until I found at some point in the garage (where there is no daylight) how I almost scratched the whole body. Although no deep scratches, But if I consider that this is a new car, then it is already over for me. But now I have noticed that the scratches can disappear with a polish. But since I don’t want to let anything go blind on it again, I wanted to ask what to consider. I would like to have this done in a workshop of professionals. Can you give me maybe some tips on what to do with such a matter ac hten muss? How, for example, workshop selection, price, season and when should the first polish be carried out after new purchase? Would you be grateful for any help….