Hi there, and thanks for sharing with us!
Transactions can be slower on the blockchain when you select a lower fee when sending from your wallet. That's not something we can influence ourselves, as we're only the receiver in this case, but we always advise selecting above-average fees for such transfers and apply goo fee when sending ourselves.
If you ever have any questions, don't hesitate to reach out to us at support@changelly.com or via the live chat on the main page – the team is available 24/7 and will be happy to guide and explain. Have a good one! ^^