Warning bogas phone calls

i would like to warn people that I have had a couple of phone calls from a contact number 0012378911 saying that they are Norton representatives  and that I am not getting the full Norton that I'm supposed to be and asking me to go into my settings and they will talk me through to get the full Norton as I was going to work I told him to ring back the next day as I was leaving for work and hung up so I contacted Norton to make them aware of the bogus phone calls I was getting the person rang me back and I explained to him that I had informed Norton about the calls and he hung up on me it sounded like a real call centre with loads of talking in the background I'm not sure if any one else has had the same call but I am sending this to make people aware