Here is their latest reply:
Dear Customer,
We are sorry to hear that you are not willing to accept our offer. We have checked with our manager and would like to offer you two special solutions as follow:
1. We would like to refund 40% of the order, which is 28.42 USD. Is it acceptable for you?
2. If you would like to return the item for a full refund, please return it to the following address: 2nd Floor, Building C, Weitian Industrial Park, Wangniudun, Dongguan. Please kindly understand that you need to pay the return shipping fee.
If you agree to one of our proposal, please contact us in time. We sincerely hope you could kindly understand, so sorry to have caused you so much trouble.