Fnb Connect Sucks

Every month i top up my Cell phone, i pay from my account, its not a free service from FNB, but FNB taking my data, voice minutes and SMSs after 30 days, i have paid for these services how dare they just remove it after 30 days, they do not have the right to remove my data voice minutes and sms if i have not used them. That is theft. This makes me so angry. I cannot make calls as i think if just topped up and boom its all gone. even if i top up near the end of month. I am contemplating moving to another telecommunications. gatvol