You're making the assumption people with accents are necessarily foreign-based workers. You can be a US or Canadian citizen and have an accent. I worked in a call center in Canada servicing Americans, I was born in Canada and lived here my entire life and I can assure you I definitely sound canadian but customer still accused me of being located in India, a place I have never even visited. So I don't think customer opinions on the matter are 100% justified and fair.