who are these people

Telemarketer and I am on the do not call list

so am I but the creeps called my cell anyway.

I called the number back. First I went through some long [***] recording that KNEW MY NAME and wanted me to verify my phone number.  I ignored all the prompts until a person came on the line.  She said it is Wellcare Health Insurance but when I asked for the address of the company, she would only tell me Central Florida.  She asked for my social security number and I told her I was not giving my social security number to someone who doesn't even know the address of the company she works for.  She asked me what state I am calling from and I arbitrarily said Texas.  She gave me this number to call customer service, which I haven't called yet, but I never did find out from this person what the call was about.  866-687-8878

Automated call said they were from Wellcare to give me info about my plan. Wanted my birthday to verify. I hung up and called back. Same automated wanted my birthday. I called Wellcare main number. They do NOT use automated system to welcome you to program and are not calling out of MA. Something has been hacked. Don't give out any info. They are not legit.