Need advice

I just bought this Ocarina off of a trust worthy european store (according to review sites), yet now that I hold it in my hands I feel like it's exactly the one Ocarina professionals advice against purchasing in videos The high notes do not sound good, almost earrapy, and I cannot get it to sound anywhere close to tutorials I've seen online Is this a skill issue ? Or should I just go about returning it ? I have 14 days to do so