Stop spam calls

I had several calls from this number, When I answered the phone they knew my name and address and asked to speak to me about my energy, As soon as I said I wasn't the person to speak to about this at the address they had for me they then put the phone down, Definitely not a legitimate call centre, Very dodgy. I blocked the number so I can no longer be called by them, I am concerned that they have my name, Mobile number and address from somewhere/someone.