If you are on subscription, you have subscription support through a web interface. Call your reseller to find out if you are on subscription and some assistance in logging in.
If you don't have a reseller, or if they are unhelpful, there are other options, and other software suppliers that can provide more assistance.
QA is the Autodesk QA team. If you have located a defect, subscription support will often forward the information to QA. If your reseller is well connected, they can forward the information to QA and potentially get some resolution for you.