Orange Grove full cream UHT milk

I bought two boxed of Orange Grove full cream UHT milk and a box of low fat. Both the full cream boxes’ milk is thick and chunky, despite not smelling or tasting off. But I’ve been put off completely and tried using one or two. But I’m essentially stuck with 10 1L boxes of disgusting milk that I don’t want to use, without a slip to return them. The expiry date is 25/07/2020 for both. I’m pretty sure I wasn’t the only one.