Be careful for **** filament products, no after-sale response

Buying from them before was a good experience, but the last order for 3D printer Creality Hyper PLA filament is a disaster. They clearly sent me a filament which is not Hyper PLA although marked as such. Could not be used at 220 deg C or at 200mm/sec print speed. Appears more glossy as Hyper PLA. Filament behaves like low speed PETG and only prints at 250 deg C without clogging at low speed. I tried communicating with them to return, test and exchange for proper Hyper PLA but received no response, I then offered to keep the "PETG-like" filament and re-order proper Hyper PLA at reduced cost to make up the price difference, no reponse from them after several messages. Unfortunately their dealings in filaments seems fishy, after-sale service is also non-existence. Will not order from them again.