I took my jumbo flap in at the end of August because one of the stitches for the double flap became undone. They said it usually takes 4-6 weeks but due to the pandemic it will take 8-10 weeks (I asked if they send it out and they said yes). It was free of charge which I was surprised because I got it from Europe in 2016. It came back around mid-October but I neglected to check my email so I called the store. The store said yes my bag is ready, so I went in towards the end of October and got the bag. They had it completely wrapped in paper, which they let me unwrap to inspect the bag. The actually replaced the stitches on both sides of the flap. They also gave me a shopping bag and a black dust bag. All in all the repair process for me was pretty smooth!
It really depends on the nature of the repair in terms of cost. I had to fill out a paper with my information and they filled out information on the bag like the serial number and the item code. Funny thing is when I went in to pick it up they mixed up my name and brought a small bag (for like a wallet), and I was like huh? But the SA just mixed up my name lol.