Pillar to post!

With winter approaching I wanted roof repair advice that I got online and decided on Flash Harry who have a branch in Blackheath. Checked business hours and not open on weekends. Does not say that they don't do business with the public. Here comes the rub though - walk through the warehouse to find someone - "We don't sell to the public but Buco close-by carries our products" Go to Buco and salesperson assists. March through the entire Buco Blackheath warehouse-sized shop to be taken to the paint counter only to be informed they don't carry stock but stock can be had close-by. So assistant didn't know that they don't carry stock which is unfortunate, could've brought me straight to the paint counter. Anyway, ask where I can get it and want to leave but no, I must pay at Buco and take the slip along to collect the product. Where do I have to go and collect - Flash Harry, Blackheath!!! Both clerks at Flash Harry and the paint desk at Buco were anything but cordial, treating me like a simpleton so now I have the product but I will not be returning to either establishment in future even though I am only a DIY customer.