Shocking service for callout and resolution

I requested a callout to service my extractor fan in July 2024. The technician came out in July and charged for the callout and has since not responded or rep**** to the status of the query - it is now the beginning of October. When querying the status of my repair parts, I was told to contact the sales department to advise them of the model to check if they have the parts. I've tried calling their sales department numerous times, but no answer and after 10-15 mins of waiting the call gets dropped. Why, as the customer must I be responsible to find out the model and parts required when I paid for a callout and the technician saw the unit?? Defy, I am more than disappointed with the lack of customer service and disregard of the service request. Hopefully reviewing on Hello Peter will afford me some response.