Citibank Student Loan Complaint

Citibank Student loan department,

Non-federal student loan Dealing with my lender or servicer Need information about my balance/terms New York

My private student loan is through CitiBank, Citi Assist loan. -/-/2016, the interest rate went up on my student loan by .25 %. That is fine. BUT, my payment more then doubled. I went from paying $130.00 a month with a 4.25 % interest to $320.00 with a 4.50 % interest rate. This seems WRONG correct? They were not helpful. They suggested I do a direct debit to reduce my interest down .25 %. So I did. My interest went back down to 4.25 % ( my original interest ) and now my payments are $130.00. So basically I am getting screwed by them because none of this makes sense. I firmly believe this new payment of $130.00 is WHAT I should have been paying with the interest increase. They tried to double talk me when I asked about my new payments after the interest hike and they were not helpful and did n't do anything. I am very scared about the next interest increase and what they will come up with for my payments.