How to get money back from a person who sold coupons?
I am a resident of California and I bought coupons from a person in New York.
When he sold me those coupons , some of the coupons were not accepted by the store and the person promised me to refund the amount if I send them back.
He sent me a prepaid shipping label and I sent back the coupons.
Now after receiving the coupons he refuses to give the money back stating that coupons are original and not duplicate.
How can I get my money back?
I do have it in an email where he is ready to send me the refund but now he is opposing it.
Kindly Help.