u/Economy_Wolverine_88

I have no idea how this is possible, but I keep getting voicemails from a university I have blocked. It shows up as blocked in my call records and voicemail app, but yet somehow I still get voicemails asking me to complete the fafsa and whatnot. Its incredibly annoying. How do I block them for good? I dont know how they keep contacting me. I have an A26 5g.