What is the name of business with the phone number 1-763-519-2710?

someone phoned my mom's cell and asked for her to have me call them back @ this 763-519 etc... Catch is I've never used my mom's cell phone and don't even know her cell number. she lives in CA and I live in OH. I phoned it back no answer, then someone speaking spanish called back saying they got a call from this number (my home phone) I asked did his number start with 763? and he said no.

I've had 5 different people calling me from this number, they just say it's a personal business matter and leave their extension number-they need to stop calling my cell phone

It's a collection company for Target check services.  I had a check card transaction get returned unpaid there and this is the company Target sold it to (it's been since October and I've been unable to pay - unemployed).  I know this is the company because I've received correspondence from them via mail.

I keep getting messages from this J&R Adjustment Company.   They have my first name and my husband's middle name with an 's' on the end, so they don't even get my name right.  I called them back and asked who they were and they wouldn't tell me.  I told them to quit calling me or I'd report them