I am with British gas for Gas and Electric, i get this through card and key which i can top up from my pc.
Being on Benefits they said in November they would put me on a tariff called "essentials" which is much cheaper rate than the standard rate.
The other day i got a statement from them for the gas it said i was still on there standard tariff for Gas but on the essentials for electric so i gave them a call,
the nice man on the other end of the phone took my details and asked for a meter reading and said he would phone back in one hour which he did.
He apologised and said i was owed £30 as an overpayment
He said you should get this next time you top up
I have just topped my gas by putting £10 on and the meter registered £40
what a nice man
But that's not the end of it he also said as i was on the "essentials" tariff and it had been such a bad winter they where giving everyone on "essentials" £50 back.
When i topped my electric key up with £10 this morning it registered £60 on the meter what a very very nice man