Used HMDZ bluetooth headphones and now iphone 6 won't disconnect from it.

Hi there. I have an iphone6 (just replaced from the prior one that wasn't working correctly because of a SIRI issue). I used my HMDZ bluetooth headset (craze Buds) for about two hours this am. I removed the headphones and turned them off. However now I have a very strange issue.

• when I press the volume switch it shows "Headphones" and the bell symbol below.

  this means I cannot hear anyone nor can anyone hear me when I call or facetime

• I was troubleshooting and turned ON the headphones again and connected to bluetooth. I pressed the volume switch and now I get "Ringer" with the bell symbol below.

I have tried:

• cleaning out the headphone hole with q-tip, compressed air, blowing into it. Nothing changes.
• I have done a hard reset
• I have reset all network settings

At this point I am clueless except to restore the iphone. Which, I don't really want to do but will as a last resort obviously. I just am extremely frustrated as this is my second iphone 6 and I don't want to have to go through all the hassle of taking it back to the store again!

Any help would be very appreciated!!