First time purchase voucher **** and money gone.

This was my first time buying on Zando, using the app. I experienced a system error at checkout, which resulted in my payment being unsuccessful but the money was deducted from my account. I had a first purchase discount voucher. The first agent I got gave me another voucher to use, which worked, however I experienced another error at checkout before I could even enter my card details. The next agent I got, a lady, on the app chat blamed my bank for this, yet I hadn't even entered my bank card details. She did give me another voucher, which could not be app**** to my purchase; only to find out one of the items was on sale, a flash sale she said, making using the voucher impossible. All this was an app system error, and no accountability from the Zando end, well the lady that gave me attitude. I also tried them on Twitter, to no help. They don't even have a number to call, you must just cross your fingers and hope on the app, and that they'll return my money. If you want guaranteed, secure online shopping, Zando is not it.