Landis and gyr refund struggle

Baught a electricity token from fnb app and saw that it was the wrong meter number as fnb app automatically adds previous meter numbers used to the last time one purchased the certain amount of electricity, contacted fnb (they cannot help) contacted Landis and gyr who is the manufacturer of the product and they cannot help me, they told me to contact the owner of the previous meter box who then contacted Landis and gyr again, chain reaction, they cannot refund me as they don't know if I have used the electricity token, how can I use it if I no longer live at that address.