pathetic service at engen garage at bayview

On friday, night at around. 9 pm we purchased a litre of milk which was spoilt we went to the store on Saturday to return the milk and we were told by the Manager that we must contact c*****, that is just pathetic service they were very quick to take our money but cannot replace the product, after being very upset we left the milk and walked out of the store, they do not realise that we support the garage every day the Manager is differently *********** because this is the second incident the first incident was when I filled petrol and the garage swiped my card twice and refused to give me a refund, it's time for the staff to catch a wake up