Hathway — internet speed/no response to complaints

Address:

560027

I am using a hathway broadband activated on april 2, 2018.
On 16th april, i have raised a complaint by calling the local support no regarding internet speed. That person assured me that complaint has been raised already and someone will get back to me. Now i am not even getting response from this local support, whose assured me that my complaint and been raised and been worked on.
I am not sure whom to reach out. I have sent couple of messages also asking for update.
My internet speed was committed as 20 mbps but its not even 2mbps.