When did you receive your tuition? It takes about 3 weeks for HELB loan upkeep to reflect in your account.
If you have received the message that upkeep has been issued to your account then it takes 72 hours to reflect. Weekends and Holidays do not count.
Kindly dial *642# and check to check your disbursement report. If your upkeep has been disbursed, you should receive a message with this status "Upkeep loan issue to student bank..."?