Over the years, I have dealt with a significant nu...

Over the years, I have dealt with a significant number of companies, both in private and business capacity. iiNet Limited is, without a doubt, THE WORST!
A simple "porting" request for Internet and Phone Services, turned into a 2 month ordeal. They are their own worst enemy and a classic example out-of-control outsourcing, sub-standard policies and procedures and an absolute lack of supervision and accountability. I was forced to escalate the matter, all the way to the Telecommunications Industry Ombudsman, in order to get a satisfactory resolution of the problem.
I will never, ever have any dealings with this "company".
P.S. As to the iiNet's reply, I will cite T.I.O.s 2018 Annual Report, page 64: Complaints received per provider/iiNet Ltd/FY18 = 7,719. Excluding "the big 3" telecoms, iiNet is the leading company per volume of complaints, followed by TPG at 6,248.