They advised the right thing as you refused to investigate this issue before you buy a used bike.
Is this a new bike ? Do you use the correct number ? it should start with 035 or 086
Yes, you are correct. The previous owner have to unbind the app. After this is happened you should be able to bind it to your phone.
They are updating the system, it should be back online week 20
Measure the pack voltage, if low your battery is blocked by software. The controller of TCmax is located in the lower part of the bike.
You need to open the battery to replace the connector., this will void your warranty. Be aware of that. You will find out it's glued from the inside. ...
That should be ok, many do not realize this battery's won't charge below zero degree celcius.
This cable should not be delivered with your bike. In fact the dealer should remove it at the pre-delivery inspection. This cable is not suitable for ...