Are Volkswagen DSG auto gearboxes troublesome?

I bought a new Volkswagen Golf auto in 2015. It's had its yearly service at Volkswagen authorised dealers just last week. The car has only done 9300 miles since new but I noticed after the service a sort...

My car had a gearbox oil change last year and now in lower gears there is a whining noise - is this likely to be a problem?

My Rover 75 had a gearbox oil change last year. In lower gears there is a whining noise which disappears when we reach 30mph. Is this likely to be a problem?