My first Enemy.

Some people just don't get it. They buy your old an slightly rusty mountain bike with worn tyres, front suspension, new brakes and a new lock for €100, which is pretty cheap for a bike in Sweden. They have inspected it and they are made aware of the wornness of the tyres. They blow the tyre the same day.

They frikking call you demanding money (€30 "no penny less") for replacing the tyre or take the bike back and threaten with Swedish laws and lawyers. Probably just to scare the foreigners with unknown legislation.

Those laws threatened with are not applicable however (I can read Swedish, so I checked) and although the inner tyre probably gave out during filling because of age (and probably slight over-pressure by its new owner), you are not responsible for them making the situation "worse". Normally you would have been kind and given them money for the materials. But the person has threatened you with his brother the lawyer and you just wormed yourself out of a "take a decision now" situation to buy time to check his claims.

So you call back telling them you do not like being threatened and that his threats were ungrounded and want to leave it at that. He calls you cheap and repeatedly unfair. You do not say it is unfair, you just find it unfriendly, nothing more. The person has threatened you and has not cooled down.

The call ends nowhere and after some swearing from their side you just end the conversation with saying you will not do anything more.

Remember kids, just stay cool and if you think you need some "1-day warranty" about this kind of things, I think most people will agree to be reasonable. At the least stay friendly.

This guy did just not get it and let his anger guide him. Poor him.