Cellphone Annoyingness

Oh my!! So a couple days ago you could call or text me I just couldn't reply to your text or call you back but I could answer your call and talk to you!! Now I can't do any!! When you try to call me it says "This subscriber is not allowing calls at this time...." WHAT!?!?!?! On my house phone I called my dad, step-mom, and sister and all of them had the same thing -_- grrr LOL!! I guess I won't be using my cellphone for a while......