Huawei — Worst service by huawei

Address:

New Delhi, Delhi, 110044

I bought huwaie 4g dongle from airtel just one month back and it has got technical problem, i reported to airtel first but they are helpless, further i contacted to huwaie customer desk, to told me to send a mail. I have send several mail and written the problem what i am facing exactly but email, which given by team huwaie is never work...
Please do the needful and save me from such kind of company like huwaie
Regards,
Rinki