Food Voucher doesnt exist.. - Consumer Complaint for Food Panda Philippines

Last Feb 13, i redeemed a food panda voucher amounting to 1000.00 from my Sodexo Application, it was deducted from my account and i was given the voucher code, but when its time for me to use the voucher it seems that the voucher does not exist. I contacted food panda regarding the issue, and all they can say is that the voucher was used in a supermarket in Magsasay somewhere in Manila. Take note that im from Zamboanga City, mindanao. No further investigation was made from their end,it only shows that the transactions with them are not secured. 1000 is a big amount, and they are just going to tell me that i hope to enjoy my service to them next time. What i need is a refund of my 1000 peso and further investigation regarding this matter..