Not the size I intended on getting

I have been ordering from sticker mule for the past 3 bulk orders. I hit “reorder” this time (expecting the same stickers I have been getting) and I was sent diffferent sizes. Whenever I inquired about this all they told me it was my fault and you can’t hit reorder with a promotion (a promotion I had no idea about?) so they argued with me and have stopped emailing me back now after telling them what I intended to order. Terrible customer service. This is the definition of talking to a wall. No personality and they don’t even have a phone number. Good luck trying to get your order amended if they fuck it up.