Well, in all fairness, the title of the buy is "...Keyboard Kit".
Like you walked into an Ikea and said "I want this, but I don't want to put it together", to which someone might reasonably respond, "Why don't you go to another furniture store?".
If you wanted to buy one pre-assembled, you could have simply asked that and probably gotten a better response, than to come off sounding offensive to begin with.
Also, to solve the blank keycap...