Pretty frustrated with some N scale train dealers lately

I'm trying to source a Kato 10-570 E531 Series Joban Line 4-Car Set to go with my 8 car set/ So I ordered from Osborn's Models in London as they have the set I wanted on their site so I placed an order for it. I wasn't too sure if it had a motor car in the set or not so I emailed them asking and no response for 5 days. This is ridiculous why have a product on your site if you don't have it in stock whatever there is no reason at all for this and not to answer emails. I filed a dispute with PayPal which I have to wait until May 3 for some reason what the actual hell. If you listed something on a website in the US and didnt have it in stock and took money for it that would be called stealing. lt looks like they don't have any in stock now hmmmmmmm what a coincidence. I saw the same set on eBay so I placed and order there too, I wake up the next day the seller responded that he didnt have it in stock and offered my an immediate refund, It looks like some people dont know how to run a business. I've abandoned my desire to find the motor set for the E531 set since there is a new set coming out in September. I'm now interested in the KATO N gauge JR 701-0series Akita Color 3-cars Set Plastic 10-1557 and 10-1558. It looks like a lot of people dont know they are selling on eBay lol.