[joeysteele]

Unless the call was urgent then I would think more that she was rude than not.
I hate phones and never answer mine when in a store.

However I have had checkout operators only actually acknowledge me when stating the total of the goods and giving me change.
At the lottery counter, I have had worse, a few times I have never had a word said between me and the assistant, she takes the slip then takes the money while constantly chatting to another assistant.

Being rude works both ways but the operator in this case,I would say, was wrong refusing to serve her.