From a branding perspective, it's a bad idea. Yes, you'd reach a lot of people efficiently. But what first impression would you be creating? You'd be shooting yourself in the foot ... cost-effectively. Alienating people at a rapid pace. Hooray?

People agree on few things, but we all agree that telemarketer calls are a nuisance. Would you really want your brand to be introduced by a nuisance caller from across the planet, reading from a script in broken English?

Telemarketing works in certain sectors, but not yours. The more optional the service, the quicker we hang up. Food delivery is definitely optional; so I suspect the success rate would be low.

Futhermore, restaurant delivery is very very very local. Overseas telemarketers are the opposite. So it's a terrible fit. Seems scammy at worst. At best, it makes your brand seem faceless, shoddy, and far away.

We'd judge you instantly for being out of touch with local realities. We'd assume you're not actually interested in direct dialogue with customers; so we wouldn't want to do business with you. We'd rather order from a restaurant in our city than go through a telemarketer in India to arrange Chinese food.

You want to emphasize neighborliness for local restaurant delvery. So this, I expect, would be a branding disaster.