No Delivery/No Contact

It's understandable the no company is going to operate as it should during this time, but Zulzi handled their error in the worst possible way. I placed the order on Monday, for delivery at 11am on Tuesday. I expected there to be a delay, but there was no notification saying there would be. The ETA just shows a random time. So I try contacting Zulzi via phone, email, twitter, facebook. All I needed was a vague ETA so I can decide if I need to go to the shop myself. After they ignore all communication, I go and buy everything I need myself and send Zulzi a message to cancel and refund to my account. I then get a message saying they have done a partial refund as a credit to use on their app again. No money in my account.