User Activity

I made a first time purcahse on ebay with a 15% discount coupon. But item was wrong and I sent back. They sent me a coupon of 15% discount and another for my courier exp (of INR 130). Now, 1st problem, I will have to make two purchases to claim my ow...
Seller convinced me to change the feedback in his favour before he replaced his item. Now he won't change the item or talk to me. What can I do? Can I submit my feedback again?