Hello I've had a few issues where there has been a discrepancy between the pack size ordered and finally delivered. I guess it has been where a manufacturer has reduced the basic pack size and the retailer is blind to the issue. How should the retailer rectify the situation? e.g. Ordered SW coffee 300g (£3) & received SW coffee 280g (£3) a smaller pack. (though website listing, email confirmation and receipt still say 300g £3) Thanks

I recently visited a well known discounted grocery store to purchase a item that I wanted - I had with me a rucksack over my shoulder as the store doesn't give out free carrier bags . The store didn't have the product I wanted so I walked out of the store passed a empty checkout and into the car park . A few seconds later a young female member of staff came running out of the store and placed her hand on my shoulder , I had some earphones in so I took them out to see what she wanted . She said she wanted to look in my bag as I had stolen something from the store , I protested that I hadn't stolen anything from the store and had the rucksack as the company doesn't give out free carrier bags and that loads of people carry rucksacks in there store . she once again said I had stolen something from the store and demanded to look in my bag . I refused and said she couldn't as I hadn't stolen anything and the only person who had a right to look in my bag was a policeman and she was more than welcome to call the police and they could search me . she refused to call the police but still demanded to look in my bag and was shouting at me in the middle of the car park outside the store and saying I was a thief in front of customers who was going in and out of the store (unfortunately I knew some of them) , after a while of her shouting at me and calling me a thief and me saying call the police she turned round and went back in the store. I stood in the carpark for a while to calm down and recover myself from the situation . I walked back into the store to talk to a manager of the store to sort out what was going on , I first found the young girl who accused me of shoplifting and asked her if the manger was available to speak to , she said there was no manager or assistant manager and that she was incharge of the store , I asked if there was a complaint procedure I was told no and that the manager would be back tomorrow and I should speak to them , she then went on to say I had no right to complain as I was in the wrong and we had a few choice words in the store with her still calling me a shoplifter - I was wondering what rights I have and what I can do about this incident