Hi to you all,
My name is Sofia Sousa and I'm the person responsible for WorldSIM's Marketing.
I saw this thread I and I couldn't leave it without a reply.
We are sorry for this situation but if you check our Terms and Conditions you can see that when we make a change to the tariffs we publish such change details on our website, therefore for your convenience you should always check it before you go abroad and use the card.
Although as we are always trying to improve our customer experience and we don't want this kind of situation to happen again because we understand that can cause some inconvenient for users, from now on we will send an email for every customer or newsletter subscriber warning for any important change in our service.
Thank you and hope this helps.
Best regards,
Sofia
www.worldsim.com