I just received a letter stating that they could n...

I just received a letter stating that they could not open a prequalification credit account because I had a security freeze. THANK the stars for that.
Did they call me? NO. Did the letter even ask if I did apply. NO. Because
I had not applied for credit. I did buy a Dell computer but I paid for it in full, so this letter, out of the blue, sends warning bells.