Odour and funny taste on sweets

I’m utterly annoyed.I purchased jelly sweets and sour worms and upon my daughter opening the pack she says she first smelt an odour however proceeded to have some sweets .She then brought the sweets to me and I also could smell and the taste was horrid.Bear in mind this product has not expired.I am even scared to open the sour worms.fast forward I complain to mister sweets and I am assured that courier will come pick up the sweets.last Thursday I got a missed call from Aramex and I could not phone the number back but I just thought they would call however that has not happened.i sent an email to mister sweets yesterday and I was contacted my innocents who imp**** that I missed many calls from aramex on Thursday and Friday,I told her that there was only missed call.she then said the driver will come yesterday later but I received no call or any correspondence from the driver.can I please be assisted .