Personally I never expect particularly prompt deliveries form any ebay seller…
sellers often have to fit a trip to the post office around, work/family which I can understand, I’ve never been in that much of a hurry to get something that I’ve phoned, I’ve only ever emailed a couple of times (politely) when stuff drags on for a fortnight or so, I would assume that if someone quotes 10 days, they are giving themselves a bit of leeway to pop into the post office on a weekend…
As a seller I always stick to my quoted dispatch time, and don’t promise a time I can’t realistically manage, which appears to be what the OP has done…
The buyer is probably just too used to CRC, Wiggle etc with there silly fast, silly cheap delivery times, couple that with a bit much sugar and caffeine in his diet then and the result is a horrid little arse on the phone…
Having said that I wouldn’t invite him to your home, yes it would be nice to slap him for the insult to your missus, but what if threatening phone calls are the tip of a very nasty psychotic iceberg?
It’s always tempting to assume these kind of people are suffering from short bloke syndrome, that’s not always the case though and I’d prefer to keep my home free of nutters if possible…