Dangerous company.It has instructed ACS,a debt recovery company to get me to pay over £1800plus for electricity used AFTER I left them on June 22,2020,Non payment equals disconnection,they say.I have paid my new cheaper Supplier about £850 for electricity used to date.It has been worse.To date I have been sent 10 plus bills ranging from £450 to £2800 AFTER leaving OPUS.The Ombudsman has been most helpful.I am asking for £600 compensation for the distress it has caused my wife.I-will us it to plant trees on our small farm.Avoid this Company,it will seriously damage your mental health and sanity.