Keeps calling everyday -

I received a called also from this number and let it go to voicemail.  The voicemail message was a gentleman calling from Staples and wanted to discuss improvements on my rewards program.  I did not return call to call back number but it was from +1 888-319-7171 x 6684.  I felt this may have been a scam so I did not return call.

Staples sales office

Called and hung up..........no one on other end of line

This lady calls and calls and calls.  I tell her I'm not interested and please stop calling me but she calls again and again.  I recognize the number now and just don't answer, but it's still a pain in the butt!

no one there but I have gotten calls from Staples before so it may be them