To be fair this is NOT indicative of Mikes Divestores in general and it does surprise me that this has happened.
Mikes Divestores are franchises. Mike Calder is the Man and runs the empire from the Chiswick store in London. I have had some absolutely fantastic deals and service from him and could not recommend him highly enough. He even once took back a Dry Suit for repair, got it turned around in less than a week and sent it back to me at his expense. Thing was, HE had not been the store to sell it to me but instead it was Mikes in East Grinstead!! Fantastic service.
Drop him a link to this page as well - I am certain he will suggest ways that Upminster can "improve" customer service!!!
London Dive Store - Mike's Dive Store