ok so i got Text and Web and i got another one but my mate told me about a better one coz i topup £15 every month i could get unlimted texts and calls but when i do i get this

There's a technical problem. It looks like you've already requested a change to your tariff. You would need to cancel this before making any other changes. You can cancel any changes to your tariff within MyO2<www.o2.co.uk/myo2services>.

i have tried but the page doesnt esist can anyone help me?