There are several places where you can get support for TortoiseGit.
Please do not mail the TortoiseGit developers directly for support requests.
An important aspect of reporting issues it to have a reproducible way for the issue and also to mention your exact version of your operating system, the version of Git and the version of TortoiseGit (this information can be found on the TortoiseGit about dialog).
TortoiseGit includes a crash reporter (if not disabled on installation), which automatically uploads crash dumps to drdump.com, where the TortoiseGit team can review them. If you have a reproducible way, please also file an issue and link the crash report.
We have a special page describing steps for debugging, where the majority of ways does not require to build TortoiseGit on your own.