Disappointed

Zando's customer communication sucks! I had a voucher to use, went to checkout and as I was about to proceed to payment realised I needed to change the address, when I went back in it said the voucher had been used... The voucher expired at midnight tonight, there's no one to speak to, and even if there was someone they'd probably not know what to do. This is the 2nd time Zando's customer has let me down. I won't be shopping there again!