No claim progress

I wish there was a no star option. I just took out a policy with Discovery Insure a few months back. I have as part of it white insurance. On 21 Jan our dishwasher breaks. I submit my claim via the app. Accoding to their adverts then you claim will be solved within 48 hours. We are now 24 days later. And no reply. I have emailed them several times then I just get a letter telling me they are so sorry that I am unhappy but they will give attention to it in 72 hours. I tried to phone today but after holding on for 15 min I was just cut off. This has been the worse service I ever had! That is why I am now trying Hello Peter