Not handled well

My son was man handled today in Spar Tops. We were on our way to friends, wanted to pop in and get something to drink. The shop was very busy with a lot of customers. When entering my son was grabbed away from my husband by the security. Luckily I was behind him to get my son, as my son was crying hysterically because he didn't know what was happening to him, why was he getting separated from his dad. Then the security said were not allowed to enter the shop with my son who is 8 years old. I told him that there is no sign that says that. There is a sign that says no alcohol will be sold to a minor, but he is not there to buy anything, he is just there with his mum and dad. I was mad as hell today with what happened, my son was so upset afterwards with what happened.