Who called from 8067479392

I keep geting the same recorded message from three diffrent numbers out of Lubbuck Texas.  The recording say's my name and gives me a number to call back with a confirmation number given.  They are driving me nuts.  I called the number and it just rings and rings.

I received 2 calls from something called PDI. When I return the calls it is after hours. It was also after hours when I received the calls.

Just got a call from this number...when I answered there was nothing.

Just got a call from this number.  Wants my husband to call "Jennifer" at this number.  Caller ID read "Collectech DVSF".  We have no idea who or why they are calling.