OK!
You DO have cIOSCORP v3.x installed, and cIOS250, which means we can fix all this.
OK. Download and run the cIOS249rev14 installer via loadmii or bannerbomb.
cIOS249rev14:
http://teknoconsolas.tv/wanin/cIOS38_rev14-Installer.zip
When it asks what IOS you want it to run under, select IOS250.
Then install cIOS249. If your wii's connected to internet, select "network installation".
If it's not, you'll need to google the file "IOS38-64-v3610.wad" and put it on the root of your sd, and choose "wad installation"
Now that cIOS249 is installed, email
[email protected] for 2 links. (cIOSCORP v3.6 Main, and cIOSCORP v3.x Uninstaller). Download both.
Put all of the v3.x uninstaller files on your sd, and run the cIOSCORP v3.x uninstaller. the .dol is found in "apps\cIOSCORP_v3.x_Uninstaller\boot.dol". run this .dol file with bannerbomb or loadmii.
This will uninstall the cIOSCORP you have.
Now run the hackmii installer, (OMG it workz!) and reinstall HBC.
You should now have the HBC back!
Then you can install cIOSCORP v3.6 if you want to play burned games via disc channel. v3.6 is compatible with 4.2 and hackmii installer.