Being a vulnerable customer, found the customer service to be half and half. Top-up on my smart meter, a bit hit and miss, they can see it’s been done, Lady at dinner time lovely and was very helpful, unfortunately got cut off, she left a voice message whilst I was trying to ring back, Bloke this evening a complete jerk, advise was to let my energy to go to nil balance, before the issue resolved. Completely infeasible in the middle of winter, to be without electric, no light and it will stop boiler. as well as screens on said meters. So can’t give money for electric or refund apparently so effectively top-up, with be lost. What a load of rubbish.