Erbauer cordless hammer drill ECD18-Li2?

I have an erbauer cordless hammer drill. The drill bit is stuck in the chuck. Reverse and hold doesn't work as it appears the clutch holding it has tightened too much. I now have a 12mm drill stuck in the drill.
Alan, April 2021
I was looking for an answer here as my drill has exactly the same problem! Were you able to get it fixed? Thanks

Rick, April 2021
link Click here to see other fixes for Erbauer.