Hi @Metka
No, you are not right. You cannot add Red Together Extra to your Red Unlimited! You can keep a Red Unlimited subscription, but you cannot put a Red Together Extra on it. You will have to take out a Red Together subscription yourself (so switch from Unlimited to Together) and then take 2 Red Together Extra subscriptions. Or you stay with your Red Unlimited and you take out a Red Together subscription for child 1 and a Red Together Extra subscription for child 2 (but you have to put them in your own name because they are still too young!)
If you stay with Red Unlimited, the total costs are as follows:
(if I use the prices of the website, I don't know what price you have agreed)
Red Unlimited (33, - euro) + Red Together + Red Together Extra (42,50 euro) = 75,50 euro
or
If you stop with Red Unlimited and go to Together, the total costs are:
Red Together (you) + Red Together Extra + Red Together Extra (55,- euro) = 55,- euro
With Unlimited you have Unlimited Data and with Red Together and Extra you have 200GB to share with 3 people.
I have the feeling that you don't quite know what to buy yet. It therefore seems best to me that you visit a Vodafone store. You can explain everything perfectly and put everything next to each other. Then you have an overview and you know what to take.
Really, my advice is to stop by a Vodafone store.