Discovery insure is threatening me

I took out an insurance policy with Discovery because it sounded so good. I should have listemed to the addage, if it sounds to good to be true, then it probably isn't. On the 5th of January there was a transformer that blew up near our home. When the power came on, both my computer and my freezer stopped working. I put in a claim for both. The computer I am still waiting for a technician to have a look at. The freezer they are trying to blame on previous work that has been done and even threatened to blacklist me and my daughter at all insurance companies because they say we are lying about our claim. Therefore I am cancelling my policy with them.