In order to tell if your car has a timing belt or a timing chain you have to inspect your engine.
Check the side of your engine, and if it has a tinplate or plastic cover, then you’ve got a timing belt. If your engine has neither of those, then it has a timing chain.
There are a few exceptions to this rule although thankfully they are few and far between. For example, the Peugeot Pure Tech has a dry belt buried inside the engine. If you are unsure about your vehicle, and cannot decipher from looking at your engine, consult your car owner's manual or manufacturers website. Alternatively, book an appointment at your local garage.