False information on website! Credit for online purchase!!

I've ordered a microwave oven on the 8th of June 2020 online. The payment was approved and according to the website, I will receive response within 24 hours. On Saturday I've visited Cape Gate House & Home where I selected to pick up the microwave oven. According to the sales manager, there was no stock in any House & Home as well as at the warehouse. She called the warehouse and they couldn't tell when they will receive stock. She assisted me friendly and was very helpful. I thought about it and would like to cancel the order. I called her now and she confirmed they might get stock in next week. I asked her the contact number to cancel the order. I called the number, several times with no success of reaching an agent. This is totally unacceptable and I would like to get my money refunded ASAP? How could you list a product on your website if you don't have stock and don't even know when you will receive stock!!????? Unprofessional service and false information!!