My 89 year old disabled mother was switched over to Ovo from previous supplier, by chance l came across a letter yesturday that was informing her they were increasing her DD from £195 to £846 a month! Contacted them to discuss and l am absolutely beyond disgusted with their customer service, rude, argumentative and ignored what was being requested from them, on the phone for almost 2 hours, constantly being put on hold for ridiculous amounts of time, not listened to and ignored over and over when told the account was to be closed and a final bill sent, coming back with a 15% deduction on outstanding amount that was added to proposed DD increase to take the monthly amount to £940 a month, was insisting on talking direct to her with the intention to confuse her and agree to the DD increase! AVOID at all costs and if you have elderly relatives please check who their energy suppliers are and change if with this company!! New supplier found and will be calling them again today for final bill to be sent with a few choice words to end!!!!!