I transferred my business energy supply to Octopus in Jan 2021. It's been a terrible mistake on my part. Octopus constantly debit a greater sum of cash from my business account than it should do due to billing for the same energy twice. They agree - they have refunded me nearly £4,500 since this summer to take account of it. Now again, this week they are about to debit cash from my account for energy used not this month (I'm on monthly billing) but right back to April. I rang them today using the number on the back of my business invoice. The operator was very professional but was in a Domestic energy team so could not help - I did suggest she make a suggestion that invoices carry a more relevant phone number. She tried to put me through to someone else. I put the phone down at 22 minutes. I called again. Quickly answered and within 2 minutes the second account handler agreed that the account is laden with errors (as I put it 'chaotic' but as she put it, 'does seem double billed'). She said she would reverse this week's huge impending bill and get the account reviewed by an Operations Manager (as per their process described on p4 of the invoice). But this is the third time I have had to complain bitterly that this energy company appears unable to supply energy and invoice no more than the amount x tariff in return. I strongly advise anyone considering moving to Octopus to hesitate. The bills are nice and easy to read - yes ! But they are rarely for the correct amount of money. As a result I am having to manage my cash flow in a way that ensures there is more money available for ridiculous and inappropriate direct debits made by Octopus. I wish I had never signed up. 1 out of 10 for nice easy to read bills. 0 out of 10 for eroding a customer's soul with what appears to be a naive administrative system behind their business and all the signs that the organisation is unable to learn from errors.