Zulzi - can' deliver but can ***** your money

While I have sympathy that Zulzi are not coping owing to the lockdown and the rush of deliveries, the they must not ***** people's money. I placed an order for delivery March 24. It did not arrive. When I phoned they literally told me that no one was even assigned yet to my shopping. By now the shelves were empty. I told them to rather refund me - however back to my credit card as I need the money to buy the groceries myself. It was confirmed this would be done. However, this has not been done - instead i have been credited with part of the money on my Zulzi account which is irrelevant since they can't deliver anyway. Also they have held onto R48.34. for some unknown reason. You cannot get hold of their customer line at all today and they do not respond to emails. I want my refund paid back immediately. The order numbers are 166035, 166036, 166037, 166038 .