Disappointed multiple times with sevice from Nandos ordering via App.

I placed an order on the App from Nandos Rosebank. 2 items missing and one item incorrectly received. Got a cheaper priced item in place of the one ordered and paid for. You cannot call a store to rectify so logged the complaint on the App. Got a call from store manager 18 hours later and no resolution. Still overpaid and no word of a refund. I logged complaints multiple times but no resolution. Not the 1st time having problems on Nandos app. Do not order from them. Sad that they can't get it right.