Frustrated MTN MOMO service

I am very disappointed in myself for trusting MTN MOMO. The way they deal with clients is terrible and absolutely inconsiderate, especially because this is a money app. I did a cashout transaction from my momo account for a cash withdrawal at a NEDBANK ATM. I did not receive a voucher for the withdrawal of the cash 7days ago and I still have not received this voucher or a refund to the momo account. A query was logged via customer number 083135 and numerous emails sent to ***. I was informed to believe this will be sorted within 72 hours, which was not the case. I am contacting the customer number and sending emails everyday for an update and all I get is lies that my query is being attended to and promises that my account will be refunded. This is so frustrating, I am stuck with no fuel to get to work and take my child to school. I honestly dont know what else I need to do at this point.