From another website
https://www.ukecc.net/consumer-topics/buying-outside-the-eu.cfm
If the items you want are sold by a website based in China, USA or elsewhere in the world you need to consider that if something goes wrong with your purchase you may not have any means of resolving the problem.
If a company in the UK doesn’t deliver your goods you can take legal action or potentially go to an Alternative Dispute Resolution (ADR) body, this is the same across the EU. However, if a company outside of the EU doesn’t deliver your goods you may need to take legal action if the trader unwilling to resolve your complaint, which could prove costly and disproportionate if the goods are of relatively low value.
Generally there are consumer protection agencies in most countries who could provide advice or assistance however it may not be possible for a person living outside of the country to use the service they provide. This will depend on the agency in the country the trader is based. You can find a list of suitable agencies here FTC consumer protection agencies
It is worth considering the protection offered by either your bank or credit card company for any purchase from a non-EU company. Under Section 75 of the Consumer Credit Act you can pursue your credit card company for a refund if there is a breach of contract.
If you receive faulty goods or don’t receive your order at all this can be useful in getting your money back. For Section 75 you have to have paid between £100 and £30,000. A lot of banks also offer protection via a scheme called Chargeback. Chargeback can be used for items under £100 but there is no legal obligation on the banks to provide this.
Companies like PayPal also offer protection but you should read their terms on this carefully.
If you do have an issue with something purchased outside of the EU you can give us a call on 01268 886690. We may not be able to help you directly but we may be aware of a consumer body that you can take your complaint to."