A few days ago I bought the new Xbox Series S console with installment purchase. The only thing is that the device didn't meet my expectations. I've been using them for a couple of days now. Can I just send it back in the original packaging?
Yes, you can return the product within 14 days (currently even more at Otto).
First: every customer has a right of return.
Second: If you haven't damaged the packaging very much, you can return the product to my unpacking.
And keep the bill for you. This is important!