Dear Customer,

Hello, and thank you for choosing Fiido. Most of our accessories are replaceable and repairable, including the chain you mentioned, which falls within the repairable range. Here is the address of Fiido's service point:

Company Name: Huang Xiaodong
Address: Via Bartolino da Novara, 51/53/55
Postcode: 00176
City: Rome
Country: Italy
Tel: 0039 3888066222

If convenient for you, you can visit this location for repairs, or you can also contact them directly by phone for inquiries.

Warm regards,
The Fiido Team