I think my devil worshiper Dad is trying to contact me from the dead, whats he trying to tell me?

Ok so I've always been into witchcraft ever since i was young, my dad tought me everything about it and showed me how to cast spells, EVERYTHING. Some things were kinda scary but I really started to get into it about three years ago nothing too dark though just protection spells and stuff. He always told me that god was bad and he had left this world to satan and he should be worshipped and that Satan gave him power. Anyway he died a year ago and i went to live with my grandparents I'm 16 now and I gave up witchcraft but reacently I've been hearing voices calling me and yesterday someone had posted me black candles and stones i dont no who, there's been really wierd things going on and its starting to scare me, whenever i go to sleep i can see blood and hear voices repeating the word kill. Is Satan angry at me for not worshipping him or is my dad trying to contact me from the dead and whats he trying to tell me? Has this happend to anyone else?