We have just received a book of personalised vouchers * weeks before our current ones r...

I was trying to change from a voucher purchase of the Guardian in paper format to an online version. I was also seeking a refund of the voucher charge which you made on the **th of June ... We have just received a book of personalised vouchers * weeks before our current ones run out. However, instead of the vouchers, we now wish to take up a digital subscription and note that you have already charged us for the the next tranche of vouchers on the **th of June. We therefore wish that this sum is returned and that you replace it with a charge for the digital subscription. Obviously we would return the vouchers but to which address?

simply refunding the voucher charge and telling me what the on line sub costs so that I might pay that from Monday the **th of July

I've been reading both The Observer and The Guardian for years

I wrote to you explaining all the above but got a silly reply indicating that my request for refund and on line sub had not been read by a human being