I had blocked a phone number in the Verizon app, and then unblocked it. The person whose number I blocked still is unable to call/text me, even though the block was taken off, and the number is showing on my “previously blocked” list. Any ideas why this might be? I have turned off the phone, I have removed the Call Filter app completely and they're still getting blocked with their calls being automatically rejected and blocked with a blue circle and an "A."