IMAS do not want to send me a letter stating that a cession agreement has ended

IMAS Finance asked me to provide a cession when I bought the vehicle in 2016 in order for them to finance it. I requested the cession from Liberty Life and provided it to IMAS Finance.

I paid off the vehicle in 2022, and I don’t owe them anything anymore. However, I am not unable to make changes to my policy now because the cession is still in place. IMAS does not want to provide a letter stating that the cession has been terminated since I paid off the car.

They should be held accountable for this. I cannot make any changes to my life policy because IMAS Finance refuses to send a letter confirming that the cession is no longer in effect.