The worst part of being an SP is having a client book and not show up, and then having to respond to 7 txt's, still without completing the sale?
Sorry, thats the real world. not every enquiry turns into a sale. and when you're working for yourself you're going to spend time without getting paid, and sometimes even loosing money.
Ask anyone who's is business for themselves in other industries, car repair, vision care, retail clothing etc. Thee are customers who make you life a real pleasure, and others who make you want to quit. Guys in commissioned jobs have it even worse. Lots of time working toward the sale while competing with others. Only 1 of them is going to get paid. In fact the higher the paycheck the more you work for nothing or even loss money. Commission guys have car expenses, coffee, dinners, entertainment etc. When there's no paycheck they loos money.
BTW please don't accuse someone of harassing you while you're responding to them in a business environment and refusing to take the order. It's not like a guy looking for a date with a civy.