Me. I had my own gas and electric meters installed. Did write to do the 'honourable' thing and advise I was changing supplier (they actually only supply the meters anyway), gave them the last meter readings and requested a final bill. They had a hissy fit because the 'new supplier' had not advised them and refused to send the final bill. I wrote 3 times, stating if they didn't send a bill then the account would be classed as closed with no further payment. I've had a few people round, they've tried send meter readers round but I refuse entry because I am not contracted with them (anymore).