If you read the sales agreement I believe it specifies the remedy in the case of late delivery beyond 30-days (plus time for excusable delays):
You may cancel your order for a refund (USD) - given that cointerrra are already allowing that ... what is your beef?
So, the hashrate guarantee was what, then? Just a smokescreen? There are laws against false advertising.
I'll gladly take back the bitcoins I paid for the miner (back when BTC was $150)