Do not order on the Sixty60 app!!!!

I've had the same experience twice where I have ordered with the app, it showing there is stock of the item then deducted the full amount but after payment has gone througj they app shows some items were not included as their out of stock. Then got told it takes up to 15 working days for reversals. Here I am, lost track of the days and NO refund. Pathetic service