I was passed to OVO from SSE with the sale, without prior warning or information. I received glowing emails from OVO expressing the excellent points of their company. Then the truth emerged - I emailed in meter readings, and waited for a emailed bill. (silly me) I complained - a person rang me, I discovered that I was expected to read meters EVERY MONTH! and keep logging on the site to get bills. I have only ever paid quarterly. I explained this and the person did not say I couldn't, and said my next reading would by June 8. Logging on I saw that estimated debits were being created based on last year's higher usage. I sent meter readings and paid to that date. There is still a debit amount showing that makes no sense at all. I tried the on-line chat (silly me) queues of 34, 54 (!) and 25 mins. I tried ringing- queue of 12 mins. I wrote a letter and posted it just before Easter - no reply. Today I received a letter asking me to pay my bill! I am moving elsewhere!