Grinder Pump Insurance refused

I am a new home owner on Stoneyridge Crescent. I was told about the grinder pump, and that I should buy insurance on repairs, maintenance, and replacement from Service Line Warranties of Canada (SLWC). I was shown a policy by an existing owner which covered those items.

When I phoned SLWC they refused to provide any insurance on my grinder pump. I mentioned they had before and the conversation was bumped up 3 times but still they refused to provide insurance. I have never lived in a municipality before, where there is a sewage system that is part of my taxes, but that I am actually responsible for! This is absurd.