I had a similar partial refund offer. I think the fact that your kit isn't even able to be assembled is a pretty serious 'full refund' indicator.
All interpersonal disagreements aside, I think that the key to all of this is that this board is not competitively priced enough to not be compared to other custom makers like Duck, LifeZone, OTD, KMAC, etc. and other enthusiasts even have complaints with Duck boards (anodizing, machining, etc.)
I feel like this is the point of no return for me on this buy. After seeing the first few boards arrive damaged, mine arrive damaged and with multiple 'manufacturing defects', all shipping halted in order to sort out issues, and finally more boards arriving damaged and in worse condition than mine I am ready to call it a failed buy. In my opinion, experiencing issues is acceptable, failing to find a reasonable solution (even at the expenditure of time and money) is unacceptable. I have participated in buys that require additional funding to stay afloat, I have participated in buys that have been delayed for very long periods of time, but I have never participated in a buy with this level of unprofessional-ism and poor QC.
In regards to any future GBs and custom kits designed and distributed by 27, I would highly recommend rethinking the purchase and sticking to trusted makers within the community. Normally I am all for supporting new makers, which is why I backed this project. Do not take the issues listed in this thread lightly, unless you are ok with receiving a similarly piss-poor product.