Please do not discard the mailing envelope and product packaging. Pictures of the proceeding items are needed when contacting DX. Know more detail about Allsmartlife's return policy from here
Always contact Allsmartlife and wait for instructions before returning anything.
1) Select an appropriate contact form here
2) Take and upload the requested pictures.
3) Wait for Allsmartlife to reply and follow the instructions.
Do not close the CSE form until you issue has been resolved.