ok now things got beyond an obvious resolution and have confirmed that Coinbase is devious in the bitcoin world.
I just called my bank and they said to go through normal ach reversal process that wud take few days.
No offense, but that is overreacting a bit. How many times did you try contacting them? One, I'm guessing. Maybe they didn't get the email.
Also, I had the same problem a while ago. It was a bug... They fixed it within a few days. My advice: Be patient.