HP India — hp printer

I recently purchased an hp printer (Model - hp deskjet ink advantage 3835 all-in-one printer).
I experienced a problem while installing the printer as the printer is not getting detected by the computer.
Twice i lodged complaints in hp portal [ case number [protected] has been created crm:[protected] & case number [protected] has been created crm:[protected] ]. It has been ten days now.
Till date no one responded to my cases.
I tried to contact the technical team through telephone but they are busy always. Even after holding 10 minutes, i could not contact them.
I tried to contact through chat option of your portal, but no one responded to me even after 10 minutes of waiting.
It is really embarrassing to experience such things with hp.