I work in retail but the nature of the business is that we work alone....sometimes our shifts are 8 or 9 hours long....in order to take a break i have to close my office and put a sign up saying when i will return....this is resulting in angry customers who are pissed off at waiting 30 mins for me to return....last week one customer made a complaint to head office as he had to wait 15 mins....aibu to take my breaks....?