Not sure exactly what you think was wrong with your car’s behaviour. Do you mean 3,000 rpm? That’s not huge revs and may be occurring just because the car is cold. The gearbox ecu takes good care of the ‘box and won’t let it do anything that could cause damage. I’d suggest you live with it for a while and see how it goes.
Having said that, I would be reluctant to live with a dsg ‘box without some sort of warranty cover. If things do go wrong, they can be horrendously expensive to repair.