Hero Motocorp — bike servicing related

Address:

Kolkata, West Bengal, 700023

On 21 feb 2018 i gave my bike for regular servicing to rounak motors khidderpore kolkata 700023 (Wb). They are charged more amount of rs 5330/- on manual bill without any gst after argument with staff they are ready to give me online bill but including gst the amount also same. After this they are not accept card payment after argument with staff they are accept card payment for two percent extra charge. Now i am asking you why are more charge on regular charge and why they are not issue online bill third one is why are charged extra two percent on cashless transaction.