Oven still not repaired

I am very disappointed with the service that I have received from the Agent, Homezone, for KIC. I reported the faulty bottom grill not working to House and Home and this was in turn logged with KIC. KIC sent Homezone out to perform the repairs on my oven. It took the agent 2 to 3 weeks from the date that I reported my issue to come out to my premises. They came in and inspected the unit and informed me that they did not have the necessary parts to perform the repair and had to order the parts and would return. About 2 weeks later when I enquired, the agent had updated the job to say that they had completed the repair. The fault was logged again and Homezone came out and at this time did repair my oven. After the repair was completed, we have been experiencing uneven heating in the oven and the bottom of the oven has been damaged due to heat issues. I then called escalated the faulty repair and the damage that occurred after the repair was done. Homezone came out to my property a third time to investigate. They took photos and to date I have received no feedback. The repair agents that came out were very unprofessional, I emailed Kic on the 12/01/2016 and still no feedback.