Standard Bank Falling Appart

I was send Instand Money voucher from Standard Bank from a friend to do a urgent purchase, when I went to the ATM to do the withdrawal of the cash the ATM said the pin is already used! I phoned the call centre number provided on the sms, the number said they cant help the system crashed. They promised to refund me Friday, that never happend then made a promise to sort it out Monday morning first thing and still waiting. This was money sent to me to do emergency buy outs.We use this service and pay the fees to send cash so that is available emediatly.This is the 3 RD time happening happening to me leaving me out of pocket for 5 plus days for them to rectify. WHAT IS THE USE OF INSTANT MONEY. It only cost you money and they dont stick to any promise. Just tried their number again with NO ANSWER .! StandardBANK YOU LETTING DOWN YOUR PREMIER BANKING CLIENTS