You probably don't.
Would you prefer a Phillippino clerk whose third language is English or a guy in Utah who is unaware that Hawaii is not a small town in Kenya and has never heard of Canada?
However, you can start with Help and Contact.
Or you can ask the experienced members here for help. The same problems come up over and over.
If you didn't receive your item and more than 45 days have passed, forget eBay or Paypal and go directly to the credit card you really paid with for a chargeback.