Poor customer service

On 28 June 2024 I sent my car Cherry pro4 elite to cherry umhlanga for 15 000 service and I informed them that the car has a problem with the boot which is not opening . To date I have not received a call from them with regards to fixing the boot I have made numerous call and I don't get a response. This problem started 6 months after I bought the car last year and I reported it then and was told they did not witness it so nothing was done . When i sent it on 28 of June 2024 only then they told me they picked up the problem to date my car still has the same problem as nothing has been done. I'm so disappointed with their customer service