In January I used MOHELA (a loan servicer partnered with the federal government) to obtain a subsidized loan. MOHELA is the servicer TTU is partnered with and you can take loans and submit payments through Tech Express. I foolishly trusted TTU without doing any research.
I paid off the subsidized loan in full FOUR DAYS after the funds were dispersed. They never removed it from my account and I have called about a dozen times in order to have the balance removed—to no avail. It has also significantly negatively impacted my credit score.
I contacted the school and they said "we can't help. Go complain to them." (Paraphrased, obviously, but that was the core message.)
Don't use MOHELA for anything. Go with another loan servicer. If you don't believe me, check out their reviews on Google.