I WAS CALLED A DEMON BY BELINDA SIMPLY BECAUSE I REFUSED TO COLLECT THE VOUCHER

so, on Tuesday get a call from Belinda ***, she phones my work landline, telling me that i won a voucher through a survey for 7 nights at a 5 stars hotel for my partner and i, ABSOLUTELY FREE, as intrigued as i was, i confirmed i will be coming through their offices the next day to redeem my voucher but then it strikes me that these people are *****, nobody will just phone you randomly to give you something free of charge, so i decided to look up the company's name which the first result was that popped up was comments on hello peter, i then realised they were ****s so i ignored their calls on the day i was supposed to go redeem the voucher, then, BELINDA leaves a voice mail message for me saying "Mrs, you are so unprofessional, in fact you are a demon, an unprofessional demon" i'm totally in shock , i mean calling me a demon simply because i refuse to redeem " my free voucher" ? I wish there were more platforms where I could go shame them , this is unacceptable