Update:
As expected, HK will be happy to replace the 3 packs if I pay to ship them back to China, which I have no intention of doing.
The question now is whether I should inspect the dead cells in the other two packs for swelling, and force charge them up, or should I replace them with the good cells from the ruptured pack. Any suggestions?
one of them reads 1.7 V
the other reads 0.01 V