Bad client servix

I went to Alpha pharmacy in Bloemfontein central park to go get a prescription that I got from a doctor I got there at 17:20 and the phamarcy closes at 17:30 the door was closed but not locked so I went in and a security guard came running to me saying its closed my husband then said to them but its not half past he was then answered by a lady shouting saying they closed the tills already and they don't get paid over time my husband said its not overtime because its not half past yet she then said he can scream as much as he wants but they knocked off...I had to go with my sick son back home without medication