Okay, that clearly looks like a pattern package to me. What is a pattern after all but instructions? Surely it's not just templates. IMO you should ask to speak with a manager and say that you expect a kit to include the instructions. I mean, that's basic.
I'd threaten to send it back if they refuse to send instructions, but if they're so low they can swindle you out of instructions, they might not refund the money. Of course, if your mom paid with a credit card, she could dispute it.
I don't have a pattern suggestion, sorry. I think that diamond pattern would be just right.