I've had situations like this, where an associate seems completely disinterested in proactively assisting customers. I handle it by re-approaching the associate myself, asking questions, and then raising the objection in response to one of the answers. If there's a narrative, I most certainly include that the associate walked away, and that I had to seek assistance and press for answers. Re: objections, I do have an issue about raising objections -- when it's not indicated in the instructions, and only appears the questionnaire! I've had this happen more than once.
While I have a suggestion for the objection dilemma, I don't have one for the dilemmas that Flash cited -- ouch!! I've had one shop rejected, and it was because of a failure to obtain information about a specific product. The instructions stipulated to get information about an alternative product, ONLY if the store did not carry the original item. The product was not on display and when I inquired, the associate told me they didn't carry it. I conducted the shop accordingly, and was told that the store DOES carry the item in question! I challenged the rejection, and after several email exchanges, clarifying that I was specifically told the store did not carry it (NOT that they were out of stock!), the decision was thankfully reversed, and I was paid.