Plain Yogurt is rotten most of the time

I don't normally review a place, but after about 12 super sour (basically about to rot) plain yogurts I got from lancewood it's now a pattern. I had to throw away so much food because its always rotten even though the expiry is a good month or 2 away. I've had "good" ones so I know what it should taste like but about 70% of the time when I open it it's super sour and the lid looks like it wants to explode. I think it's time to switch to another brand, unfortunately I can't support you any longer.