Calling asking for personal details

Received a call about a week ago asking if I'll be at home the following day to receive a parcel. Caller had my full name and residential address. Her and I then arranged that they deliver to my office as I'm not at home during the day. A week has passed and I haven't received anything. I haven't ordered anything recently so I'm not expecting any parcel's. These people had my name and address and without thinking I gave them my office address. I've been calling the number they called me from and it hasn't been answered until today, I asked what company they are and where my parcel is. She claims they have had problems with their drivers and will probably get the parcel today. When I Google their name I found a lady who had the same type of call asking for her address. I'm really worried, what are these people doing with our addresses. This is very fishy!!!