How to get a breastpump through insurance ?

K

I should start by saying I live in Canada and have GroupSource insurance through work. I emailed about a breast pump and they said they didn’t cover it? I’ve read you need to get a prescription from your doctor but wouldn’t they tell me if that was the case? I’m not sure how to go about it since they’re pretty expensive and I’m not wanting to spend that much money on something I’m not sure I’ll use.