This is a user to user forum so we can't help with returns. However--users here might be able to help with any software problems. Did you make any changes to the laptop or to the the replacement? Did you change any drivers or hardware or install any incompatible programs or even reinstall windows? What kind of problems are you having with the hdmi port, bluetooth and other issues? You will have to continue to work with Customer Support. They will work with you to continue to fix any hardware problems. You do have a one year warranty on hardware. 
I bought a Dell G5 5505 gaming laptop. It was having technical issues like shutting down apps automatically, a lot of heat generation, webcam, and microphone. I request a refund, but they said only replacement can be done though it is under a 30-day return policy. They replaced it and even this is faulty with bluetooth, HDMI port issues among other such issues. I ask for a refund and now they say it can't be done as the initial invoice date is out of 30-day return policy, though I received the replaced laptop is under 30 days return policy.  I have been on a call with Technical and customer support for about 4 hours and they are useless. They keep making me go back and forth. Anyone has any solution
Return request for Dell G5 laptop