vodafone pay as you go help?

I have just got a vodafone sim card.
I bought a voucher for £10 and i rang up and topped up my phone.
I thought that topping up with £10 would get me unlimited texts in evenings after 7:30pm
However, i've just found out that you had to activate the unlimited texts bundle, so i rang up and followed the instructions...
Does this mean, because i only activated it AFTER i topped up, then i won't get my unlimited texts tonight after 7:30pm?

I have read the vodafone website and it isn't very helpful, i've read the text unlimited part of the website but it hasn't helped.

Thanks.
 
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