Do not use Coinbase! They have extremely poor service and will not support you if you ever encounter issues logging in. Instead, they will write a generic response to your ticket and immediately close it. If any major bank tried to pull this they would get buried in lawsuits.
Again, avoid this service at all costs. Forget their greedy 5% fees on deposits/withdrawals - it doesn't even matter if you can't get your BTC or USD back period. That's a 100% fee.
So you aren't be able to log-in to your account because your ticket was "immediately closed". Can you log-in now? I am aware that poor customer support is always the problem of most crypto exchanges and coinbase is not the only one. Are you able to log in now? What problem did you encounter?