SOLNET - waves accountability on poor workmanship on “No Warranty” secondhand solar panels

I had secondhand solar panels added to my existing system by Solnet 2months ago. Yesterday water streamed out where secondhand panels were connected to my existing panels. I fully accepted that there is no warranty on secondhand panels. Although I was charged for labour and new pvc pipes to connect it to my current system. When I requested it to be fixed, I got a quote for R650.00 for call out fee. Also when I called I could hear a lady in the background saying there is no guarantee on secondhand panels, without even nowing where the problem lies. I did send here son a picture where it is clearly visible that the new pipes weren’t glued properly which comes down to poor workmanship! It has absolutely nothing to due with secondhand panels. I was charged to have it fitted and for the new pipes.