Sorry I can't give more helpful advice. It is what it is, and you won't be the only one with 'missing' vouchers...but you will be sorted in the end.
Don't shoot me, I'm only the piano player. I DON'T work for or on behalf of EON.Next, but am willing to try and help if I can. Not on mains gas, mobile network or mains drainage. House heated almost entirely by baby dragons.