Terrible customer service.

I've made a purchase online. few months down the Item was making a funny sound, I then contacted defy directly on the 17th January 2023. I was advised to contact HiFi directly to log a call I then did so on the 17th of February 2023.

We are in March I contacted them again to follow up I was told there is no service request. I spoke to 2 agents now and they just left the conversation without any confirmation as to what will happen next it looks like the complaint has not been logged once again. What do I do next?