iMac fusion drive split

I have an iMac with a Fusion drive and it won’t start up. The upgrade to Mojave was interrupted and now I c an only get into recovery mode. In recovery mode -> the disc utility shows 3 internal drives. AppleAPFSMedia: says it’s an unitiazlized solid state drive. Apple HDD says it’s a disc drive. Apple SSD is the other.

When I try to reinstall OS there aren’t any hard drives to install on.

I attached some screenshots, what needs to happen to make the fusion drive a single drive again?

Also when I select erase disc, the drive can only erase to Mac OS Journaled. But when I try to erase it throws an error.