Masons Online terrible

I ordered a vacuum cleaner online. There were 2 left in stock and I payed through pay fast. I got a call to say there was no stock and Diva would get back to me. I phoned a few days later and spoke to Diva andrequested that if there is no stock they should refund me. Diva promised to call back and to date, I do not have the vacuum cleaner and I have not been refunded