I think the word "racism" was a stretch of the word. But complaining about someone's accent in a globalized economy is a bit unfair. I mean Nokia is a Swedish company, so you might have gotten a representative with an accent like the Swedish chef on the Muppet show - Why do you assume that you deserve someone who speaks your exact language in your exact accent?
My English isn't bad, it's my second language though. When I call the US for customer service or other professional business, many times I have trouble understanding people's accents, sometimes it's not the accent but all sorts of idioms that are taken for granted in the US. Frustrating, but that's the way it goes.
It probably isn't racism but it is a bit anglo-centric to expect that everyone fits theirselves into your standards.