Business ProfileforStudent Loan Services

I graduated college in 2015. My federal loans were with navient. I had private loans to pay off so I tried to manage them for awhile but couldnt afford. I struggled greatly with navient from 2015-2019. I made some payment and put my loans into forbearance for a time. They were giving me inaccurate information so after researching my options, I moved my loans to another federal loan servicer, ****. A condition to move my loans was consolidation which I did. My loans were with **** in 2019 but were somehow moved to Aidvantage without my consent during the pandemic. Now my loans are at a much higher interest rate and Aidvantage is telling me that I will accrue $90K in interest which is way more than the original amount I ever took out. I cant afford these payments and I wouldnt have consolidated had I known this would happen because I had loans from 2005-2006 that had 0.5% interest. When I call Aidvantage I either cant get through (wait on call for over an hour only to be told their no longer taking calls and hung up on) or they refer me to the department of education. The department of education is also not taking calls but I was able to speak to someone over chat today. They said there is nothing they can do and keep referring me back to my servicer. I accrued I retest during periods of time that I was not supposed to accrue interest and now Im accruing at an astronomical rate that I will never be able to get from under. There is NO ONE on either side who can help and every month I accrue more interest. I need help. This is so unbelievably unfair and no one is taking any accountability. I didnt agree to these conditions and theyre just moving our loans all over the place without consent and adding interest. When I talked to Aidvantage last night they told me there were too many letters on my account to review with me on the phone and I could review in my account but I cant find them anywhere on my account when I log in. WHAT AM I SUPPOSED TO DO?!?