Question about Shimano Cn-Hg701

I bought the exact same a while back.. it came with the quick-link.... no box.
There are two versions.rivet or quicklink..the galaxus description is not clear which one they supply.
The best is quicklink ...I have linked and unlinked many/many times without an issues for deep cleaning etcetera.
As for length from my experience most chains need to be spliced to length with rivet removal tool.
If you expected quick link then lean on galaxus for refund/return without question.

Basically about the chain links: fortunately there are always more than you need. You have to take the old chain down, lay it out on the floor and count the same number of links as the old chain on the new one. Then it will work. I think riveting is better than quicklinking, but that's a matter of taste.