I am about ready for the hammer and chisel…
Try using a small, round hard object to push on the connection from the side. Something like a torx screwdriver head or a small allen wrench. You’ll mush the band material but it’ll be fine.
Always worth a short soak in warm water first. Use a tooth brush to try and clean around the joint slot. It’s often salt/sweat, general grime and soap residue that builds up.
Thank you for your replies, I’ll give them a try
(I still have the chisel…)
Got it! Thank you both.
I used both techniques, (but could only mark one)
Take it to Apple store.