MISLEADING DATA BALANCE

I am very disappointed with MTN prepaid data. I normally buy 1G of data every month. This month (April) to my surprise. I got free data on top of the 1G I bought, which amounted to 2G. Now the sad thing with this free data that I did not ask for is that it can only be used from 1AM in the morning. Because this free data and the data I bought appears as one balance it is very difficult to manage the data that I bought. I was surprised that I couldn't access the net while my balance was still 1G. That's when I discovered that this free GIG can only be used after 1AM. MTN must have separated the two balances (day & night data) so that it is clear what my actual, normal 'day' data balance is. This looks like a tactic to mislead customers into finishing their data. I don't want to use internet at 1 AM in the morning. Please separate the two balances (night & day balance) or just keep your freebies