In most cases, going through some companies dispute process will work 99.99% of the time. That is my experience buying from a lot of online shops (directly and

In most cases, going through some companies dispute process will work 99.99% of the time. That is my experience buying from a lot of online shops (directly and via ebay) that they will in a grand majority of cases respond reasonably quickly and refund you or swap the item. That isn't true for every transaction and for every shop. But most of the time a bad interaction can be resolved via the help line or a dispute process. But even if that fails doesn't make the shop a scam. It makes them a bad shop. You can say so in your review since "bad shop" is a subjective opinion and not a statement of fact. "scam" is not only an objective fact but also something illegal so it's going to require some evidence to back that up. And yes, that can be used against you in court. If the defendant had gone through the dispute process, it is more likely the court would have atleast partially sided with them, if they showed up in court (which they also didn't) and claimed to have been emotionally distraught or similar when writing that review over the cost or process of whatever happened. This is the difference between freedom of speech as it is in the US and freedom of opinion more commonly deployed in Europe. Statements of fact require you to have some kind of proof. The level of proof will differ depending on what it's about, but insinuating that someone is a scammer will require you to show that to be fact.