Wish you well
This quote is a classic
It MAY indeed have been a problem with the shop if you are doing the "15 minutes past the hour bookings, for 60 minutes" at peak times
The shop and possibly the ML just didn't want to lose face by telling you. Peak hour is the key. Noone cares if you do this 15 minutes past the hour booking, when there aren't 2-3 other punters wanting to book on the hour close to your booking
Eventually the opportunity came up to double book, and the greed got the better of them
It was just a matter of time
Lots of punters knocking down the door speaks louder than a punter who has his preferences for a booking. It's all business to them