Expired Rite Brand "Long-Life" milk

I bought 6 pack UHT Rite Brand milk from Shoprite Naledi Mall and as I gradually consumed the milk as per norm on a daily basis, found that most of the cartoons were off/expired.

Milk is very expensive these days and it is really frustrating to find that the milk bought has an expiry date: 17/06/2024 and yet now in 2023/09 the milk is already off and shows more when microwaving to heat up the milk temperature.

I would appreciate a speedy resolution that will not have me using my money to go back to the shop and buy milk which I had already bought and spent transport buying.

I thank you