Avoid Ovo like the plague! I have had nothing but trouble from them, & plan to move to another supplier as soon as possible, but they are using delaying tactics on my billing to even make that difficult! They failed to charge me for gas consumption for a year, until i queried it... then suddenly hit me with a bill for over £600, which as a 71 year old pensioner, I will really struggle to pay. The gas consumption side of my smart meter stopped working, but as I'd recently installed solar, & had a woodburner.. I, in my naivity, & also as well recently processing the death of my mother, assumed that was because my consumption was negligible. After hours spent waiting on the phone to eventually get through to agents in S Africa, who, though helpful within the limitations imposed on them by this unscrupulous company, have indiginous African/S African accents & are very difficult to understand, so communication is very difficult, one wonders if this is intentional. Their email complaints system is equally opaque. It's virtually impossible to get any response at all. However, after my last negative Trustpilot review, I did eventually get a phone reply by a British customer agent who offered me a paultry £50 compensation for all my worry & inconvenience, plus waiving of their £75 per energy supply exit fee (£150 total) when I moved to another supplier. I had requested a postal final bill, but after a month, that hasn't arrived. I looked on their app, & they have added the 2 exit fees, so I was lied to. Why should I trust the reading & charging from an App & system that didn't even realise it wasn't charging me for my gas consumption! They are obviously delaying my postal bill with the full & comprehensive details to be charged, of their own mixup... to scupper my switching to a better supplier. This must essentially be business malpractice. I am investigating going to the Ombudsman... but I believe there is a huge queue. This Company should not be trading!