you will probably be banned from the store now, you could have caused them to be fined thousands of pounds. By law the staff are not allowed to give you any assitance , not even direct you to a part ot the store, they can only tell you that they will be able to serve you at 10am. If you ignored the law you will have put that supervisors job in jeopardy if anything comes back to the store. she can be instantly dismissed for groos misconduct, I hope she has reported you for the action but she could well be too scared to do that as she will know the gravity of her own situation now, it is a very very important and fundamental part of sunday trading laws, she could not even have stopped you.