I'm using Prepay carry over 19 and received this txt at 29th April. "Prepay Carry Over 19 renews overnight on 02-05-2017 for 19.00 dollars. Top up now to have credit for your plan to renew and so you don't lose your carry over."
So I top up $20 and received this txt at 30th April. "Vodafone: Gr8, yr credit card top up of $20.00 was successful @ 8:33pm 30/04/2017. Yr available credit is now $20.21 Ref 83333919. Pls keep 4 yr records"
But right before I just realized my plan didn't renew and my $20 was gone. I can't understand what happen. Could you please explain why it is and how I can prevent like this happening?