In my account balance I have around $78.00. How do I apply this amount to purchase boosters? If I look at top up my account, the only way is with a top up card or credit card. I do have my credit card assigned for auto top up for my monthly base plan renewal. So is there anyway to use money in my account balance to buy boosters? I couldn't find any information on how to do this? If not what can you apply that money towards? Thanks!