Cant find fault on Faulty unit? - Here is a claim withdrawal and it's no longer insured.

My fridge started to trip the power once the power goes on and carries on doing that for a while then it will randomly trips the power a few times a day. So, I called Appliance Wearhouse, they looked and couldn't find any problem on the spot, they installed a monitoring thing, and the fridge tripped the power again during the night. They gave me a report saying the PC board is not working correctly and it's not repairable and is damaged to the power going on and off all the time. So, this was the start of December. I called Discovery and asked if I'm covered. Yes i am. So, i sent them the report from Appliance WH, they then assigned a company that only does cell phones and small appliances. This was then corrected the next day to another company that came out, also looked at the fridge and said they can't find anything wrong and i must call them as soon as it trips again. 1 hour after they left, the fridge tripped the power. Called them, cant get hold of anyone. Next thing I get a mail from Discovery Insure saying that Im withdrawing my claim and the fridge is no longer covered in the future. WOW!!!! Just like that! So, I mailed and called discovery asking what *** is this??? The claim is not complete. So, they advised that they will call the company to come back to look, this was a week ago, to date I have not received any feedback from Discovery, not the company that they have sent out. Is this the poor service levels i must get use to a purple policy holder? What will the issue be if something more drastic happens?