Commercial support for Kubuntu is available from Canonical and from many of the companies on Ubuntu Marketplace.
Community help and support is available from a number of places for Kubuntu in several languages.
The main IRC support and chat channel for Kubuntu is #kubuntu on Freenode.
Please also read the IRC Guidelines page.
Join the Kubuntu Users mailing list for help and chat about Kubuntu.
To do so, you may use the ubuntu-bug program by going Alt-F2 and typing in : ubuntu-bug <package>
If that fails, you can also file bugs through the Launchpad web interface.