Approximate the amount to 6 digits after the decimal e.g. 0.01621158715085814 to 0.016211 (6 digits after the decimal point)
Add an extra satoshi to the shortened amount above, that is, approximate it to ENSURE your transaction is SUCCESSFUL e.g. Amount to send: 0.016211 (approximated amount) + 0.000001 (1 satoshi) = 0.016212
Send The amount to the address copied from the website
Your Transaction will be verified as successful INSTANTLY as long as you use the stipulated fees above (Normal or Priority, and your airtime/Data credited INSTANTLY while your Bank Transfer will be credited within a couple of minutes.