Thanks for your concerning. They have just solved my problem yesterday (09/10/2017). It's sucks because my problem started on 27th of July (~1.5 months). Anyway, they did return me my money but I think I never use Coinbase again. I agree with you that Coinbase is one of the worst platforms ever!
Good to hear that your problem was finally resolved.
I'm not sure whether you are aware of this or not but the Coinbase CEO actually said that the aim in Q3(aka the quarter that we're currently in, and is about to end) is to focus on fundamentals like customer support, and he said that he will be aiming to reduce customer support wait time to 6 hours.
What a joke if you look at how long you waited, 1.5 months is unacceptable.
I fully agree with xypos. Get out of coinbase, and find another wallet/exchange to use. Coinbase is a bomb waiting to explode.