One disaster after another

I contacted the office to report a fault on the energizer reading low vaultage. I was told it would cost a call out of R480 plus if there are repair costs to the unit if not a warranty related repair. I was first told the unit is not under warranty then queried that whilst the quote was dated September the unit was only installed in November. I mentioned to office staff if I could have some indication of day/ time in order to make arrangements. After 2 weeks no shows and follow ups someone comes out to refit unit. But the costs differ to those quoted and no one can provide a fault report. The office say it's power surge or unit is dropped, I request a report indicating what was repaired. I requested an invoice with a date and confirmation of repair to unit (what part was replaced/repaired). I was met with hostility and told I am full of s...t. No one advised of cod, I asked if I could do an eft and if someone could email or sms a reference/ invoice number and cost, I was told jaco will bring the invoice then I was told the extra call out is for the call and for invoice. Rachelle threatened to confiscate the unit. Jaco left with unit saying he's getting another opinion.I'm confused