I received a welcome £5 discount code for ordering via mealzo, however when I went to redeem it, it didn't work?

There was some confusion from the shop about our order. Initially, they said that they didn't have the order and said that it couldn't be for their chippy, as they don't sell Fish Suppers for £5 (I too was surprised at the price listed on the app). The only proof I had was that the money had come from my bank. The chap in the shop insisted "nope!". I found the confirmation email in my spam folder and the £5 fish supper was honoured. Delicious as always from LFB. Something about the shops own app being new and not being used yet?? It was live when I placed my order and unavailable for orders 20 mins later. No regrets. Cheeky wee 5 quid fish supper for the teen of a Friday. Would still pay regular price any other day. Food always great. Used the shops own app to support the shop instead of using Just Eat. Hope to use their own app again when it's up and running.