No Response on email and Call centre cannot assist

My vehicle instalment recently fell into arrears as I fell ill and was unable to pay my instalment for 2 months, I am now back on my feet and I am in a better situation than previously. I am however unbale to pay the full arrears at once, I have sent numerous emails for assistance, call centre agents are unable to assist me and and they keep providing me with an email address, of which I get no response. Is there anyone that can assist me, or respond to my emails