my e-mail was hacked, I have completed the online questions several times but nobody is getting back to me even after getting an e-mail that i would get an answer after 24 hours

my telephone number changed ever since I created my account and I also do not remember the answer for my secret question. I completed the form online 3 times and each time I am told somebody would get back to me within 24 hours but so far nobody has answered. I am getting desperate and really do not know what else I can do.