Snoty, slimey milk

I normally buy a six pack of long life milk, makes it easier for me than going up and down to the shops. Anyway, i bought a six pack, and the expiry date is sep 2015. Within two days the milk was slimey and snot like. This is the first time this has ever happened. I only use c***** long life milk. I have no idea what was wrong with the milk, why it was like this. <br> <br> If you guys do contact me, only call between 8am-1pm, after 1pm i do not answer calls. <br> <br> I truly hope this was a one time experience. Its sad actually. <br>