who is this

I got this unknow phone call today number is on phone but rest was unknown.I called back it was some law office , wanting me to leave my name, account number with them and someone would return my call.I didn`t leave anything but telling them not to call me again I do not leave my personal information with any one.I have a voice mail if they need any thing they could tell me who they are and who they are looking for.
Ever since I got my straight talk phone and the number I have I get many calls like this every week .This needs to stop.

Have gotten a few calls from this number.. Do not have a clue.. Call back, no answer or busy..

Lady called last pm to our home looking for someone that does not even live here. Was about 7:00 pm. Have NO idea who these people are

This is an attorneys office. They are doing collection calls. This was for a hospital in FL from maybe 5-6 years ago.