It isn't HashFast's fault cedivad can't comprehend a simple Terms and Conditions agreement specifying DEC 31 as the deadline after which refunds are issued.

Oct 20th - 30th is (obviously) the old range for the anticipated start of shipping, and (obviously) not the entirety of guaranteed shipping dates.

HashFast never promised to start shipping Batch 1 on Oct 20th.

HashFast never promised to finish shipping Batch 1 on Oct 30th.

HashFast never committed to shipping all Batch 1 orders in 10 days.

That interpretation is prima facie absurd and cedivad is going to be laughed out of court.

EDIT: Even if cedivad has the best lawyer he can afford...