Chat with us - last time I tried, it did not work. Plus requires continuous attention to the screen to check if I got any response from your agent.
Twitter - 160 character limit is too small to explain the issue. Plus not comfortable with twitter.
Phone support - The page clearly says this - “Kind request to use phone support only if you were unable to find assistance via other modes of Customer Service”
Email - it is too slow and many times I dont get response for couple of days. And I am clueless on what is happening.