Don't know if I know this person

Got a call from this number today.  Caller ID said Walgreens.  Robo call.  Said they had important information, had my name.  When they asked for my birthdate I hung up and called the local Walgreens Pharmacy.  They had no messages for me, knew nothing about any calling.

I got a call from this number today.  They said they were Walgreens and asked for my birthdate.  I hung up on them and called my local Walgreens.  They said they had not tried to contact me and I asked them to investigate this and report it.  Very suspicious.

Got a call from the same phone number and asked for my birthday also!  Very suspicious!!!