Do you find it rude when a customer service rep insist too much if you're busy?

I briefly answered a call about a service. I was interested in the offer but told the lady I'll call back because I was at work, to just give me the number.

She did but wouldn't listen to my ''I'm at work, I can't go on, me let call back''. She kept being so persistent with the offer that I wasn't longer interested. What part of I'm at work and will call you back don't you understand? I ended up hanging up.

I find that very rude. What about you?

Do you find it rude when a customer service rep insist too much if you're busy?
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