Dealing with a company at the moment who seem to be incapable of sending us a correct invoice. The first two were on duplicate book receipts, undated, no abn, no itemisation of works carried out. Just that it was a "repair" and that it was paid.

We've had works carried out on our camper van roof that cost us $1000. We were assured that the new part would come with a 12 month warranty. The third invoice we got, after we kicked up a stink, had all the relevant information (like date, camper rego, our name, their name, abn and GST component) but under description of works carried out it just says "Labour, Repair". So if we were to have a warranty issue, we have nothing to say what the repair actually was and can't prove that it was the roof that was actually repaired.

We've phoned and emailed them, been into their premises, but they still won't forward one on. So what do I do next?