I recently changed the credit card I use to top up my prepaid account. On June 5 it topped up and I received the usual SMS indicating that it had done so. Three days later, I got another SMS that said my base plan had expired. Today (June 10) I received an email that said my account had been inactive for 5 days. In prepaid self-serve it says my account is active, and the transaction history shows that it did charge my card on June 5 (and checking my credit card online account confirms this). I have been sending and receiving texts all this time so it appears the account is indeed active. Should I worry?