Working hours misrep

It's not the first time that I went to Sheet street only to find that they have closed earlier than the actual time scheduled or notified to the public. When you say a shop is closing at 15:00 on a Sunday, It shouldn't mean that the staff will be leaving the store at 15:00 and to accommodate that the store has to close at 14:50. It is extremely unprofessional and a huge inconvenience for the consumer who actually wanted to purchase something there. Sort out your staff! For all our sakes!!