Hp — Hp printer 515

I brought a HP printer 515 and it get faulty after 25-26 days o[censored]se. I complain on HP service center then they say that engineer arrive in 3-4 days but engineer comes on 6-7 days or so. after constantly working of about 2-3 hrs of engineer and he says parts are faulty and ordered. and says other engineer arrive in next 3-4 days but the second engineer arrive after 10-12 days and works about 2-3 hrs again and says other parts are ordered and arrive on 3-4 days now 15-16 days over no engineer arrive .I ask engineer what is the process of replacing he said that during 14 days of purchase .(my printer gets faulty on about 25-26 days on the date of purchase).
I complain on HP service center and they divert the call on HP consumer care. And HP consumer care says that " engineer tells about that parts replace or printer replace" it seems that the consumer care agent has no idea about company policy and ask me to divert the call on supervisor of engineer that the person tells me the printer replace or parts replace (now he is also trying to divert me) then I merge the call of second engineer and made him to talk to the agent and engineer says that 14 days procedure to agent and agent fetch that 14 days replacing policy and says to me the 14 days procedure. before the merging of second engineer the agent doesn't know about the policy. Now I'm totally disappointed by the service and want refund of my amount