Options:
(a). If you want a refund because the product you received was faulty or defective in some way, or arrived broken, you might want to take pictures of it. This could be helpful to your case assuming the damage is something visible.
(b). For example, you may need to supply the merchant with a letter to dispute the transactions. A letter or email of a different address will not resolve the issue-even if it's an email.
(c). For instance, you could include a receipt for a transaction containing high quality flat-rate x10 ounces as payment. Figure out exactly what the seller did that actually created the transaction.
(d). Sign the transaction in front of a notary. Once you're satisfied that you have everything you need to dispute internet transactions, print the form out and make your signature.Choose from options above and answer: What most naturally follows?

How to legally dispute internet transactions
Gather information about the transaction.
Before you do anything, get all the documentation you have regarding the transaction-including receipts, confirmation emails, and shipping notifications-and make copies to share with the merchant.
You want to be able to explain to the merchant exactly what the problem is and how you'd like it resolved.
Answer:
(a).