Who are you? It is very easy! EASY. You just don't want to do it. THIS IS HARRASSMENT.
It is my money. I want it credited to my gas account!
I will not change my meters. That suits EON. It does not suit me. I'm nothing but a second class customer! And I am very very very unhappy!!!
If this money is not transferred to my gas account I will be contacting my MP. This is not acceptable. I repeat THIS IS HARRASSMENT.
I am just a forum volunteer. Not only do I not work for E.On Group, I don't work in the energy industry AT ALL. Please don't attack me as it's beyond my control. I just happen to know a ton about this stuff partially through my own research and also because I have friends who have taught me everything they know.
It is literally just impossible to just randomly move credit between different types of meter i.e. Credit <> Prepayment regardless of what meters you have because there has never been a method put n place to do so. And arguably, I cannot ever see such functionality existing ANYWHERE because a: hardly anyone would use it, b: it's a potential fraud risk and c: it's a nightmare to implement!
And because you have a Traditional Prepayment Meter, I'm afraid credit transfers
are basically impossible. The functionality to do so exists only with Smart Meters.
In addition, by topping up any kind of Prepayment Meter - Smart or otherwise - you are handing over your money to your energy supplier in exchange for the supply of gas or electricity. At that point, it's no longer your money as you immediately transfer it to the supplier.
You are of course entitled to contact your MP if you wish, but I suspect they'll just reject your complaint with more or less the same explanations I'm offering here. Plus the fact your MP can't technically get involved in this kind of dispute very easily as it's usually out of scope.
What you do with those
Electricity Top-Up Vouchers in your case is your choice. Whether you Top-Up your electric meter with them, shred them, put them in the bin or burn them, I don't really care much as I have no control over that. But by default the one thing you cannot do in your case, is exchange them for a gas account credit. Use them or lose them. It's your choice.