Data/airtime

Have been s client since 1984 and have always been satisfied with the services but astonished at their Made4U services which seems to change very quick. Their latest price,to convert from airtime to data is rathe strange and needs to be queried.

For 7 days day/night price is as follows.

2.5GB = R70.00 which,seems to me, R16.00 per gb and 500mb=R40.00 or R40.00 for 2gb and R32.00 for 2gb.

Their other option is as follows.

7 days date/night price is as follows.

1g night + 1g day = R32.00 which works out to R16.00 per g.

Would appreciate if this can be explained so one may know why the difference in the two prices.