In this case, I was looking for compatible capsules identical to those already purchased fair, which I appreciated the quality. I found the net brand, and resellers. But the quality was not the appointment. Capsules damaged on first use.
Very good relationship with the seller, very accommodating. On emails exchanges, he agreed to take me back my capsules, despite the conditions (open package, damaged capsule used, ....).
Except he says he never received my shipment in return.
Amazon not support any commitment. Its only role is to its e-commerce available (and probably collect a commission by the way)
Other sites are here (pixmania example).
To flee. I have proof that they did not check the items they carry, and laugh totally suites to sell.