Here is a few links:
https://heng-long-panzer.de/de/
http://www.rc-panzer-shop.de/en_GB
https://www.elitemodelsonline.co.uk/Cars/Tanks/Henglong-Spares
https://www.nitrotek.co.uk/spare-parts/heng-long-taigen.html
Mate, as @BigGinge says, check your battery charge and also, check the motor connectors, the beeps you hear when push the "on" button" in ESC comes from the motor.