Royal Enfield — RE : very bad service at service center in hyderbad.

I took my bike for service to Venkataramama automobiles at Attapur, hyderbad. they charged me 2800 rupees for some services and still i face many issues. i went back to them thrice with same issues, but still they don't respond to my issues. i fear to ride my bike after i took my bike to this service center. There is no high skilled worker at thsi serive center. kindly please suggest me whom can i reach now, or else i can never ride my bike as before.