Student loan worst service on requesting an agreement

Worst service. I took a student loan in 2014 debit order went off my dad account. When I started working I visited the branch 4 times in 2016 to move this and was a nightmare they keep putting on the line with the call center. We go so tired of trying that we left the debit order on his account. I have now asked him to cancel it so I can pay it off. The call center calls me every hour on the hour. I have asked them to assist with the agreement so I can check total cost of credit. Each person that calls says they see the note and still call. I finally call the loans department which now tells me to call transactions accounts. Why would I call transactions accounts to get an agreement for a loan. Honestly I have to keep running up and spending my money to buy airtime for something that as a customer should have access to. All I want is my initial agreement so I can understand what the total cost of credit was and what has been paid so far. Please help me as I am so frustrated.