Need help on Neu motor's repair!

[superek4]

Hi, I have sent my neu 1515/3d for repair but since 1 month ago there's no reply. They emailed me about the cost which is $20 for a bearing.

I gave the green light but since then there's no reply on how to pay or when can I get it. I emailed the repair customer service so many times.

What other email address do they have which they will reply?