[steven09]

My bicycle does not charge the battery and the company does not want to assume the guarantee and they still do not sell any spare parts. This company disrespects the customer. My bike is unused.

 

[MNwild]

I haven't had to use the warranty yet. I take it that you filled-out the warranty registration:

Warranty Registration

All Serial 1 eBikes are covered by a comprehensive warranty policy, and supported by our dedicated Customer Support team and Help Center. To facilitate the quickest and easiest resolution of any future concerns that may occur with your eBike, we encourage all customers to fill out the below...

serial1.com

...and then they probably asked for Description of the problem, pictures and/or video?