The Zelle FAQ article "I’m unsure about using Zelle® to pay someone I don’t know. What should I do?" can be sumarized in three words: "Use something else".
Zelle is a great way to send money to friends, family or others you trust such as your personal trainer, babysitter, or a neighbor. If you don’t know the person, or aren’t sure you will get what you paid for (for example, items bought from an on-line bidding or sales site), we recommend you do not use Zelle for these types of transactions, which are potentially high risk.
Zelle does not offer a protection program for any authorized payments made with Zelle - for example, if you make a purchase using Zelle, but you do not receive the item or the item is not as described or as you expected.
If you get scammed, they won't help you in any way to get a refund. Reclaiming the money would be your own responsibility.