Disappointed with the "handling" of my claim

I am very much dissatisfied by how my claim was handled. I submitted the claim with regards to screen damage on my phone. The phone was collected and I was told is is "fixed" and needed to pay for access. I then paid the access requested. The phone was returned. The phone didnt even last for a few hours. The screen which was "replaced" started showing funny colors and flickering. This is after the phone claim took more than 10 days. Because there was so much information I needed from the phone, I had to still fix the phone myself after paying premiums and access. It is clear that they opted for cheap equipment to make more gains while me as a paying customer dont get the service I pay for. I informed them about this and have since been told they will get back to me. At this point, they are not even responding to my messages.