I want my airtime

<p>I never understand how your billing works. When there's no airtime it functions correctly. The minute one loads airtime it disappears as though the phone had standby services waiting to be cleared. I don't appreciate having to not buy airtime just so I can avoid unnecessary billing from you guys. Including stupid messages telling me I have 4.75mb remaining when I don't. Fix this. I'm so tired of your poor service delivery.</p>