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.
I'm using their wallet but not on buying on crypto that they do offer.About on your issue if they do close out your ticket without even tending to solve out
your issue then its too unprofessional but as I advice you should open another one and address it once again until they would take and resolve it.
Just give them sometime yet coinbase is being known on currently one of the biggest and reputable company as of this moment.