Who called from 9712089963

I have been getting repeated calls from this number for weeks.  I don't answer.  They don't leave a message.

Called my cell phone, which I do not appreciate....my phones are for personal use NOT HARASSEMENT and ADDITIONAL CHARGES/COST.

I picked up ready to record the fun (see how long I can keep them on the line) - no response (sigh).

do not have any idea WHO or WHAT this is....NOT INTERESTED. ITS A SAD DAY WHEN YOUR ONLY ALLOWED TO BLOCK 12 callers at a time..just removed all 12 to add this number. WHAT A [***] PAIN IN MY [***].....

Got a call and missed it.  They did not leave a message.  I called back and the message said the number was unavailable, call back later. I blocked the number