Hi. I have some LTC in my Coinbase account.  It spiked in price and I entered a sale. Received confirmation that my sale went thru by looking at my account.  Then got an email that said my transaction was cancelled.  No reason provided.  By this time it was 20 mins later and price had dropped (I had sold at higher price).  I went to sell again and it went thru but now at lower price.  The sale was simply to have proceeds go to cash in my account, not transferred out anywhere.

Seems to me that coin base simply did not want to honor my original sale since I sold right at the spike. 

Had anyone experienced this before?   How do I file complaint with coinbase and what is the likelihood they will pay me the difference that I lost out on ? 

This really concerns me and sounds quite dishonest.