Who called from 3128467513

I keep getting calls from this number.  They say it's from Medical Alert and that my equipment
is ready for shipment.  I've told them to stop calling but it doesn't seem to register!!!!!

Recording from Medic Alert. I called back and it rang once and then a recording said "the number or code you have dialed is incorrect."

Caller is listed as 'UNAVAILABLE'.
Has called my office four times in past week.

Caller: 'MEDIC ALERT BILLING'  Lists number as 'UNAVAILABLE'
Harasses my office regularly:  Has called the following times this week:
4:46pm - 06/10/2015
9:15am - 06/11
2:24pm - 06/11
3:15pm - 06/12
4:20pm - 06/17

This company has called my office five times this week.  it is pure harassment from a telemarketer, as I have no business relationship with the company - 'MEDIC ALERT'.