Before you message our support team, it's always a great idea to check our forums to see if anyone has posted about this issue before, or see if you can get information about your problem.
If you still think you may have a bug please message our support team with as much information as you can provide about the problem you have come across.
Be sure to include your username, and if it's related to a particular quest, please provide the quest name. If you are also able to attach a screenshot that helps immensely with trying to solve the issue for you.
If you repeatedly have the same issue, please mention this and any steps you are aware of that trigger this bug.