Accused of *****ing

On the 16 August 2022, home choice delivered goods at my house and I was at work, I was surprised because I didn't order anything, the next day I phoned them to collect the boxes because I never phoned them to place any order and I don't know where they got my details. They came after 2 or 3 days. I received a call from them accusing me that I stole some of the things that were in those boxes of which I didn't even open the boxes, they are now threatening me that my name will be black listed and they will take legal actions against me for something I didn't even order or take.