Poor service delivery

I returned a faulty float switch to them in July 2024. First they said they will have a look and inform me what's wrong. No feedback for weeks, always an excuse, they haven't had time to look at it or the technician is out on call etc. On 11/09/24 they informed me they will go to the supplier to find out what is going on. That was the last time I had any feedback. Now they are just ignoring my enquiries.